There were suggestions that the club would look for a new leader following a dismal start to the season, but the R's were rejuvenated on Monday night with a 2-0 win over Aston Villa.
"I don't think he's under pressure," Mourinho told reporters. "I think, under pressure, are the managers with their place in danger. I'm happy Harry is not one of them.
"I'm happy that his boss (Tony Fernandes) came out, in difficult moments, not in easy moments when it's easy to come out, and told the country clearly that he trusts Harry, he's the man for now and the future. Harry is perfectly calm and steady and knows his place does not depend on results. He has everything to work in a stable way."
Sixteen points separate league leaders Chelsea and second-from-bottom QPR.