The winger-come-scrum half will remain west of the Shannon until at least the summer of 2018.
Since joining from Lansdowne in 2012, Healy has scored 20 tries in 57 appearances.
Healy has been named in the Connacht side for tomorrow's meeting with Leinster at the RDS.
Meanwhile,
There's no Cian Healy in Leinster's matchday squad for tomorrow's game at the RDS.
The prop is awaiting the result of a second hearing after he was cited for a strike with the knee to Toulon hooker Guilhem .
After initially having a two-week ban overturned, Healy is facing a re-hearing on the original charge in front of a different judicial officer in London.
Leo Cullen has made a full eleven changes from the win over Munster.
