The Chelsea manager has frequently moved to play down his side's chances of winning the Premier League, but his City counterpart says that he pays no attention to his comments.
Mourinho has played down his team's title chances throughout the campaign despite spending plenty of time at the top of the table and, after a shock 1-0 defeat by Crystal Palace on Saturday, he claimed that it was no longer possible for the Blues to lift the trophy.
Chelsea is two points behind league leader Liverpool, while City is a further two points back with two games in hand, but Pellegrini pays no attention to his rival's comments.
"I don't respond to it because I don't know what he says. It's not my duty to respond to what Mourinho says. I don't know the way he thinks."
City has two games in hand on the top two, with trips to Liverpool and Everton to come in the final stages of the season. Pellegrini believes that the top four all have the same chance of winning the title but wants his side to capitalize on their extra games.
"My way of thinking is that the four teams will have the same options to win the title," he said. "The other teams have 18 points more to win, six games more. We have eight games more. We have to win those points. We don't have six points, we have two games extra to play – it's not the same thing.
"Do I regret the points we dropped away from home earlier in the season? I don't think, at this moment, it is important. It is too far away to start thinking or talking about those games.
"If you look at the whole season I think we are the second team in terms of points playing away. We can only influence what happens in the future."