Cikakken jumla mai zuwa: Union of Kėdainiai (ko Yarjejeniyar Kėdainiai, Lithuanian: "Kėdainių unija", Polish: "Umowa Kiejdańska") yarjejeniya ce tsakanin magidanta da yawa na Grand Duchy na Lithuania da sarkin Daular Sweden, Charles X Gustav wanda aka sanya hannu a ranar 20 ga Oktoba, 1655, a lokacin mulkin
Ruwan Ruwan Yammacin Yakin Arewa na Biyu. Ya bambanta da Yarjejeniyar Kėdainiai na 17 ga Agusta, wanda ya sanya Lithuania a ƙarƙashin kariyar Sweden, manufar ƙungiyar Sweden da Lithuania ita ce ta kawo ƙarshen ƙungiyar Lithuania tare da Poland da kuma kafa manyan masarautu biyu a cikin Grand Duchy na Lithuania.