The Island's Conservative executive council voted against a motion of no confidence in Andrew Turner.
Opponents said Mr Turner caused "turmoil" over his personal arrangements and past expenses.
Mr Turner, who has been the island's MP for 14 years, said he was "very pleased" at the vote.
The Isle of Wight's Conservative Association Executive Council met for over three hours on Friday evening to debate whether they should "rescind" their choice of Mr Turner as the parliamentary candidate.
Mr Turner, who had a stroke in 2006 and now suffers from the speech disability known as aphasia, said he won over members of the executive by "telling the truth, as I always do."
"The truth is that we're busy working towards the election and we're very pleased about that," he said.
The motion which had been submitted by an association member, proposed: "The executive council can no longer have confidence in Mr Turner's candidature and requests him to stand down as the candidate with immediate effect."
Two Conservative Association trustees had written to Mr Turner saying he was "in thrall" and "totally dominated" by his parliamentary aide and former partner Carole Dennett. Concerns have also been raised over his past expenses claims.
Earlier this month, Mr Turner told the BBC: "In the end, I make the decisions".
By designating his home in Newport as a second home, Mr Turner was able to claim Â£103,000 in allowances in 2004.
The MP has said he "can't remember" what happened around that time, in terms of why he was spending more time in London.
After Friday night's meeting Chairman Allan Wells said party rules prevented him giving a breakdown of the vote about Mr Turner, but said it had "secured his future".
"It wasn't an easy meeting, there were lots of different opinions. There was no unpleasantness. The party will move forward in a united manner," he added.

The 23-year-old made 116 as Tim Groenewald and Lewis Gregory rattled through the rest of the hosts line-up.
Jennings, who hit 15 fours, finally fell top-edging Josh Davey to gully before Durham were bowled out for 256.
Tom Abell and Davey fell lbw to Rushworth, then Onions bowled Marcus Trescothick as Somerset closed on 30-3.
Durham batsmen Mark Stoneman and Scott Borthwick both fell cheaply as Somerset started brightly before Jack Burnham (33) helped repair the innings in a 79-run third-wicket partnership with Jennings.
Burnham eventually fell when he was bowled by Davey.
Gregory then claimed two wicket in two balls, including uprooting Paul Collingwood's middle stump first ball, as Somerset looked to gain some momentum.
Rushworth became Gregory's fourth victim of the day, departing to an exceptional slip catch from Jim Allenby it left the visitors with 12 overs to face.
And last year's Division One leading wicket-taker struck in his fourth when Abell was trapped playing across the line before nightwatchman Davey was caught out in the next over when the ball nipped back.
Onions' inswinging yorker then dismissed the Somerset captain as the away side limped to the close, trailing by 226 runs.
The Isle of Wight's Conservative MP has survived an attempt by his own party to force him to stand down as a general election candidate.
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Keaton Jennings' century and three quick wickets from opening pair Chris Rushworth and Graham Onions gave Durham the edge against Somerset on day one.