In the Belly of the Dragon (French: Dans le ventre du dragon) is a Canadian comedy science fiction film, directed by Yves Simoneau and released in 1989. The film stars David La Haye as Lou, an aimless slacker who is dissatisfied with his job distributing flyers around the city, and signs up to be a drug testing subject for two mysterious scientists (Monique Mercure and Marie Tifo); meanwhile, his delivery colleagues Steve (Rémy Girard) and Bozo (Michel Côté) must team up to find and rescue him before the medical experiments go horribly wrong.

The cast also includes Andrée Lachapelle, Pierre Curzi, Jean-Louis Millette, Roy Dupuis, Angèle Coutu, Suzanne Champagne and Pierrette Robitaille.