Andrzej Mlechko is the author of more than twenty thousand drawings and illustrations published in dozens of newspapers and magazines. There were 46 collections of his works – books and albums. The artist’s work was presented at 125 individual exhibitions in Poland and 30 abroad. In 1983, he opened his author’s gallery in Kraków. The gallery was conceived only as a short-term experiment, but due to the great interest of the public, it is still active. In 2000, a branch of the gallery opened in Warsaw.