The Cluemaster is a supervillain appearing in American comic books published by DC Comics, commonly as an adversary of the superhero Batman as well as a recurring enemy of Tim Drake, the third Robin. Cluemaster first appeared in Detective Comics #351 and was created by Gardner Fox and Carmine Infantino.

Gardner Francis Cooper Fox was an American writer known best for creating numerous comic book characters for DC Comics. He is estimated to have written more than 4,000 comics stories, including 1,500 for DC Comics. Fox was also a science fiction author and wrote many novels and short stories.