opinion: Mr. Justice Douglas
  delivered the opinion of the Court.
  This is a civil suit brought under § 4 of the Sherman Act, 26 Stat. 209, as amended, 15 U. S. C. § 4, to enjoin alleged violations of § 1 and § 2 of the Act. The civil suit was filed on the heels of a grand jury investigation in which no indictment was returned. The Government is using the grand jury transcript to prepare the civil case for trial; and appellees, who are defendants in that suit, desire the same privilege. They moved for discovery and production of the minutes under the Rules of Civil Procedure. The District Court granted the motion, ruling that appellees had shown “good cause” as required by Rule 34. It rested on the ground that the Government was using the transcript in preparation for trial, that it would be useful to appellees in their preparation, that only in this way could appellees get the information. These reasons, the court held, outweighed the reasons behind the policy for maintaining secrecy of the grand jury proceedings. 19 F. R. D. 122, 128.
  The District Court entered orders directing the Government to produce the transcript in 30 days and to permit appellees to inspect and copy it. The Government, adamant in its refusal to obey, filed a motion in the District Court requesting that those orders be amended to provide that, if production were not made, the court would dismiss the complaint. Alternatively, the Government moved the District Court to stay the order pending the filing of an appeal and an application for extraordinary writ. Appellees did not oppose the motion; and the District Court entered an amended order providing that, unless the Government released the transcript by August 24, 1956, “the Court will enter an order dismissing the complaint.” As the Government persisted in its refusal, the District Court entered judgment of dismissal. The case is here by way of appeal, 32 Stat. 823, as amended, 62 Stat. 869, 989, 15 U. S. C. § 29. We postponed the question of jurisdiction to argument on the merits. 352 U. S. 997.
  First. The orders of dismissal were final orders, ending the case. See United States v. Wallace & Tiernan Co., 336 U. S. 793.
  Appellees urge that this appeal may not be maintained because dismissal of the complaint was solicited by the Government. They invoke the familiar rule that a plaintiff who has voluntarily dismissed his complaint may not sue out a writ of error. See Evans v. Phillips, 4 Wheat. 73; United States v. Babbitt, 104 U. S. 767. The rule has no application here. The Government at all times opposed the production orders. It might of course have tested their validity in other ways, for example, by the route of civil contempt. Yet it is understandable why a more conventional way of getting review of the adverse ruling might be sought and any unseemly conflict with the District Court avoided. When the Government proposed dismissal for failure to obey, it had lost on the merits and was only seeking an expeditious review. This case is therefore like Thomsen v. Cayser, 243 U. S. 66, where the losing party got the lower court to dismiss the complaint rather than remand for a new trial, so that it could get review in this Court. The court, in denying the motion to dismiss, said
  “The plaintiffs did not consent to a judgment against them, but only that, if there was to be such a judgment, it should be final in form instead of interlocutory, so that they might come to this court without further delay.” Id., at 83.
  Second. On the merits we have concluded that “good cause,” as used in Rule 34, was not established. The Government as a litigant is, of course, subject to the rulés of discovery. At the same time, we start with a long-established policy that maintains the secrecy of the grand jury proceedings in the federal courts. See United States v. Johnson, 319 U. S. 503, 513; Costello v. United States, 350 U. S. 359, 362. The reasons are varied. One is to encourage all witnesses to step forward and testify freely without fear of retaliation. The witnesses in antitrust suits may be employees or even officers of potential defendants, or their customers, their competitors, their suppliers. The grand jury as a public institution serving the community might suffer if those testifying today knew that the secrecy of their testimony would be lifted tomorrow. This “indispensable secrecy of grand jury proceedings,” United States v. Johnson, supra, at 513, must not be broken except where there is a compelling necessity. There are instances when that need will outweigh the countervailing policy. But they must be shown with particularity.
  “(1) To prevent the escape of those whose indictment may be contemplated; (2) to insure the utmost freedom to the grand jury in its deliberations, and to prevent persons subject to indictment or their friends from importuning the grand jurors; (3) to prevent subornation of perjury or tampering with the witnesses who may testify before grand jury and later appear at the trial of those indicted by it; (4) to encourage free and untrammeled disclosures by persons who have information with respect to the commission of crimes; (5) to protect innocent accused who is exonerated from disclosure of the fact that he has been under investigation, and from the expense of standing trial where there was no probability of guilt.”
  No such showing was made here. The relevancy and usefulness of the testimony sought were, of course, sufficiently established. If the grand jury transcript were made available, discovery through depositions, which might involve delay and substantial costs, would be avoided. Yet these showings fall short of proof that without the transcript a defense would be greatly prejudiced or that without reference to it an injustice would be done. Modern instruments of discovery serve a useful purpose, as we noted in Hickman v. Taylor, 329 U. S. 495. They together with pretrial procedures make a trial less a game of blindman’s buff and more a fair contest with the basic issues and facts disclosed to the fullest practicable extent. Id., at 501. Only strong public policies weigh against disclosure. They were present in Hickman y. Taylor, supra, for there the information sought was in the trial notes of the opposing lawyer. They are present here because of the policy of secrecy of grand jury proceedings. We do not reach in this case problems concerning the use of the grand jury transcript at the trial to impeach a witness, to refresh his recollection, to test his credibility and the like. Those are cases of particularized need where the secrecy of the proceedings is lifted discretely and limitedly. We only hold that no compelling necessity has been shown for the wholesale discovery and production of a grand jury transcript under Rule 34. We hold that a much more particularized, more discrete showing of need is necessary to establish “good cause.” The court made no such particularized finding of need in case of any one witness. It ordered that the entire transcript be delivered over to the appellees. It undoubtedly was influenced by the fact that this type of case is complex, long drawn out, and expensive to prosecute and defend. It also seemed to have been influenced by the fact that the prosecution was using criminal procedures to elicit evidence in a civil case. If the prosecution were using that device, it would be flouting the policy of the law. For in these Sherman Act cases Congress has guarded against in camera proceedings by providing that “the taking of depositions . . . shall be open to the public” and that no order excluding the public shall be valid. 37 Stat. 731, 15 U. S. C. § 30.
  We cannot condemn the Government for any such practice in this case. There is no finding that the grand jury proceeding was used as a short cut to goals otherwise barred or more difficult to reach. It is true that no indictment was returned in the present case. But that is no reflection on the integrity of the prosecution. For all we know, the trails that looked fresh at the start faded along the way. What seemed at the beginning to be a case with a criminal cast apparently took on a different character as the events and transactions were disclosed. The fact that a criminal case failed does not mean that the evidence obtained could not be used in a civil case. It is only when the criminal procedure is subverted that “good cause” for wholesale discovery and production of a grand jury transcript would be warranted. No such showing was made here.
  Reversed.
  Appellee, Colgate-Palmolive Co., moved under Rule 6 (e) of the Rules of Criminal Procedure, note 5, infra.
  Rule 34 provides in part:
  “Upon motion of any party showing good cause therefor and upon notice to all other parties, and subject to the provisions of Rule 30 (b), the court in which an action is pending may (1) order any party to produce and permit the inspection and copying or photographing, by or on behalf of the moving party, of any designated documents, . . . not privileged, which constitute or contain evidence relating to any of the matters within the scope of the examination permitted by Rule 26 (b) and which are in his possession, custody, or control . . .
  Rule 37 (b)(2) provides:
  “If any party . . . refuses to obey ... an order made under Rule 34 to produce any document or other thing for inspection, copying, or photographing . . . , the court may make such orders in regard to the refusal as are just, and among others the following:
  “(i) An order that . . . the contents of the paper ... or any other designated facts shall be taken to be established for the purposes of the action in accordance with the claim of the party obtaining the order;
  “(ii) An order refusing to allow the disobedient party to support or oppose designated claims or defenses, or prohibiting him from introducing in evidence designated documents or things or items of testimony . . . ;
  “(iii) An order striking out pleadings or parts thereof, or staying further proceedings until the order is obeyed, or dismissing the action or proceeding or any part thereof, or rendering a judgment by default against the disobedient party;
  “ (iv) In lieu of any of the foregoing orders or in addition thereto, an order directing the arrest of any party or agent of a party for disobeying any of such orders ...”
  Rule 41 (b) provides in part:
  “Unless the court in its order for dismissal otherwise specifies, a dismissal under this subdivision and any dismissal not provided for in this rule, other than a dismissal for lack of jurisdiction or for improper venue, operates as an adjudication upon the merits.”
  While Rule 41 (b) covers motions to dismiss made by defendants, the portion quoted shows that it is not restricted to that situation.
  Rule 6 (e) of the Rules of Criminal Procedure provides in part:
  “Disclosure of matters occurring before the grand jury other than its deliberations and the vote of any juror may be made to the attorneys for the government for use in the performance of their duties. Otherwise a juror, attorney, interpreter or stenographer may disclose matters occurring before the grand jury only when so directed by the court preliminarily to or in connection with a judicial proceeding or when permitted by the court at the request of the defendant upon-a showing that grounds may exist for a motion to dismiss the indictment because of matters occurring before the grand jury. No obligation of secrecy may be imposed upon any person except in accordance with this rule.”
  In United States v. Rose, 215 F. 2d 617, 628-629, those reasons were summarized as follows:
  See, e. g., United States v. Socony-Vacuum Oil Co., 310 U. S. 150, 234. Cf. Jencks v. United States, 353 U. S. 657.
choices: comity: civil rights comity: criminal procedure comity: First Amendment comity: habeas corpus comity: military comity: obscenity comity: privacy comity: miscellaneous comity primarily removal cases, civil procedure (cf. comity, criminal and First Amendment); deference to foreign judicial tribunals assessment of costs or damages: as part of a court order Federal Rules of Civil Procedure including Supreme Court Rules, application of the Federal Rules of Evidence, Federal Rules of Appellate Procedure in civil litigation, Circuit Court Rules, and state rules and admiralty rules judicial review of administrative agency's or administrative official's actions and procedures mootness (cf. standing to sue: live dispute) venue no merits: writ improvidently granted no merits: dismissed or affirmed for want of a substantial or properly presented federal question, or a nonsuit no merits: dismissed or affirmed for want of jurisdiction (cf. judicial administration: Supreme Court jurisdiction or authority on appeal from federal district courts or courts of appeals) no merits: adequate non-federal grounds for decision no merits: remand to determine basis of state or federal court decision (cf. judicial administration: state law) no merits: miscellaneous standing to sue: adversary parties standing to sue: direct injury standing to sue: legal injury standing to sue: personal injury standing to sue: justiciable question standing to sue: live dispute standing to sue: parens patriae standing standing to sue: statutory standing standing to sue: private or implied cause of action standing to sue: taxpayer's suit standing to sue: miscellaneous judicial administration: jurisdiction or authority of federal district courts or territorial courts judicial administration: jurisdiction or authority of federal courts of appeals judicial administration: Supreme Court jurisdiction or authority on appeal or writ of error, from federal district courts or courts of appeals (cf. 753) judicial administration: Supreme Court jurisdiction or authority on appeal or writ of error, from highest state court judicial administration: jurisdiction or authority of the Court of Claims judicial administration: Supreme Court's original jurisdiction judicial administration: review of non-final order judicial administration: change in state law (cf. no merits: remand to determine basis of state court decision) judicial administration: federal question (cf. no merits: dismissed for want of a substantial or properly presented federal question) judicial administration: ancillary or pendent jurisdiction judicial administration: extraordinary relief (e.g., mandamus, injunction) judicial administration: certification (cf. objection to reason for denial of certiorari or appeal) judicial administration: resolution of circuit conflict, or conflict between or among other courts judicial administration: objection to reason for denial of certiorari or appeal judicial administration: collateral estoppel or res judicata judicial administration: interpleader judicial administration: untimely filing judicial administration: Act of State doctrine judicial administration: miscellaneous Supreme Court's certiorari, writ of error, or appeals jurisdiction miscellaneous judicial power, especially diversity jurisdiction