The Defence Forces has said Trooper Shane Kearney is to undergo surgery on his skull following the attack on a UN vehicle in Lebanon.
Trooper Kearney, 22, was seriously wounded when the armoured UN vehicle he was travelling in was surrounded by a group of armed attackers in Lebanon in December.
The Irish UN peacekeeper was injured in the shooting incident which left 24-year-old Private Sean Rooney dead. Trooper Kearney, from Killeagh in Co Cork, was medically evacuated from Lebanon to Ireland.