Balotelli has been in and out of favour under Jose Mourinho, although the Portuguese boss' desire to keep him remains unchanged.
When asked whether Mancini would be interested in signing Balotelli, he confirmed he would jump at the chance to bring him to Eastlands.
"I'd gladly take him right away," he told La Repubblica . "Mario is potentially a world class player, especially considering his age, as he already changes a game.
"I don't know about his current behaviour, but I've never had reason to complain when working with him."