Cahir was drafted in as short-term injury cover for Leo Cullen's side earlier this season.
Connacht have announced that prop Jerry Cahir will join the province from Leinster this summer.
The 25-year-old was drafted in as short-term injury cover for Leo Cullen's side earlier this season, and has made 14 appearances in total.
Connacht confirmed yesterday that veteran loosehead Denis Buckley will leave the province at the end of the season.

Phil Foden Agrees New Contract In Principle With Manchester City
Hugo Keenan Commits Future To Leinster And IRFU For Another Two Seasons
Heimir Hallgrimsson Includes Seven New Faces To Upcoming Training Squad
Kfm Accounts Dept Vacancy
Kildare Minor Football Team To Play Westmeath Announced
Tuesday Morning Sports Update
Monday Evening Sports Update
Kildare U16s Power to Leinster A Football Title