Mancini, who was sacked by Manchester City last May, promised to pay for dinner with Mourinho if the Turkish outfit beat Chelsea in the second leg of their last-16 tie in the Champions League this evening.
However, when asked if he would take up Mancini's offer, Mourinho said in a press conference: "No, because I have no interest.
"In my plans after the game, I don't have a meal with somebody that has the same job as I have and this is the only thing we have in common. The fact we both are football managers. Nothing else."
The deciding match at Stamford Bridge tonight follows the 1-1 draw in Turkey on February 26.