O'Mahony is one of five changes to the team
Peter O'Mahony returns to the starting line-up and resumes his role as captain ahead of Saturday's Pro12 match with Leinster in Dublin.
Showing no ill effects from his return to competitive action last weekend, flanker O'Mahony is one of three personnel changes to the pack with Niall Scannell and John Ryan returning to the front row.
Two positional switches in the pack see Donnacha Ryan move to number four, partnered by Billy Holland who reverts to the second row.
In the backs, Rory Scannell has successfully rehabbed the neck injury he sustained against Cardiff in round 2 to start alongside Keith Earls in the centre for the first time this season.
The final change sees Ronan O'Mahony start on the left wing.
Should he feature from the bench tomorrow, Robin Copeland will make his first appearance of the season while also named among the replacements is Jack O'Donoghue who returns to action following a neck injury picked up in the win over Edinburgh in Round 4.
Munster team and replacements to face Leinster:
(15-9): Simon Zebo, Darren Sweetnam, Keith Earls, Rory Scannell, Ronan O'Mahony, Tyler Bleyendaal, Conor Murray.
(1-8): Dave Kilcoyne, Niall Scannell, John Ryan, Donnacha Ryan, Billy Holland, Peter O'Mahony (Capt), Tommy O'Donnell, CJ Stander.