Arsène Lupin is a fictional gentleman thief and master of disguise created by French writer Maurice Leblanc.
The character of Lupin was first introduced in a series of short stories serialized in the magazine Je sais tout, starting in No. 6, dated 15 July 1905. He was originally called Arsène Lopin, until a local politician of the same name protested, resulting in the name change.
Lupin was featured in 17 novels and 39 novellas by Leblanc, with the novellas or short stories collected into book form for a total of 24 books. The first story, "The Arrest of Arsène Lupin", was published in the magazine Je sais tout on 15 July 1905. The character has also appeared in a number of books from other writers as well as numerous film, television, stage play, and comic book adaptations.
Aside from the Arsène Lupin stories written by Maurice Leblanc (1864–1941) himself, five authorized sequels were written in the 1970s by the celebrated mystery writing team of Boileau-Narcejac.