The former Arsenal shot-stopper has spent the 2016-17 campaign at Anfield but has now decided to hang up his boots at the age of 39
Liverpool goalkeeper Alex Manninger will retire once his contract expires at the end of June.
The 39-year-old moved to Anfield at the start of the season as third-choice goalkeeper behind Simon Mignolet and Loris Karius, but did not make an appearance and will call time on his professional career next month.
"I thought about it a couple of months ago and I was keen to decide myself, not wait again for the summer and whether I receive a phone call or not," Manninger, who won 33 caps for Austria, told the club's official website.