¿Por qué diablos? (literally "Why Devils?", although it can also mean Why the hell?, itself a pun on the main character's nickname, "Diablo") is a 1999-2000 Colombian telenovela produced by Cenpro TV and broadcast on Canal Uno. It starred Manolo Cardona, Marcela Carvajal, Paola Rey, and Victor Mallarino. It was directed by Sergio Osorio.

The telenovela focuses on a poor teenage boy named Juan Cantor (AKA Juan Diablo), part of an international ring of underage thieves. After his best friend dies in a shooting, he decides to avenge his friend's death by killing the head of the organization, La Araña (The Spider). He uses his skills to gain the trust of the Leader and that way gets closer to him. The young man is later sent to a juvenile facility, and there, he falls in love with his psychologist who was also the wife of his boss.

As of May 2008 Telemundo was planning on including a remake of the series in its 2008-09 U.S. prime-time television lineup. It later came to be known as Más Sabe el Diablo, broadcast in 2009.