Lee, who created the superhero team with artist Jack Kirby in 1963, told CNN that he enjoys the "glamour" of the blockbuster's success, but is not financially rewarded for it.
He said: "I hate to admit this, but I do not share in the movie's profits. I just share in the interviews, in the glamour, in the people saying, 'Wow, I love that movie, Stan' - but I'm not a participant in the profits."
The Avengers has made more than $1 billion (£623 million) worldwide since its release at the end of last month, making it the highest grossing comic book adaptation of all time.
Lee and Kirby are acknowledged as co-creators of the property in the movie's credits. The latter's name was originally omitted from promotional material, sparking controversy within the comics community.
The Avengers is now showing in cinemas worldwide.
Watch a clip from The Avengers below: