Diary of a Mad Black Woman is a 2005 American romantic comedy drama film directed by Darren Grant and written by Tyler Perry. Inspired by the play of the same name, it marks the debut feature film of Perry, in addition to being the first entry in the Madea film franchise. The film stars Perry alongside Kimberly Elise, Steve Harris, Shemar Moore, and Cicely Tyson. The film tells the story of a woman who is thrown out of her house by her husband on their 18th wedding anniversary and subsequently moves in with her grandmother. This was the only film Perry wrote and did not direct.

Filming began on July 21, 2004 in Atlanta and Fairburn, Georgia. Diary of a Mad Black Woman was released theatrically by Lionsgate Films on February 25, 2005. The film received mostly negative reviews from critics, but it was a box office success, having grossed $50.7 million worldwide against a $5.5 million budget.

The sequel, Madea's Family Reunion, was released on February 24, 2006.