A World Without Thieves (simplified Chinese: 天下无贼; traditional Chinese: 天下無賊; pinyin: Tiānxià Wú Zéi) is a 2004 Chinese comedy action drama film directed by Feng Xiaogang and starring Andy Lau, Rene Liu, Ge You, Wang Baoqiang and Li Bingbing. The film is an adaptation of a 1999 novelette of the same title by Zhao Benfu. The original story is moderately different from the film adaptation. The film was first released in Shanghai, China on 5 December 2004. It clinched the 2005 Golden Horse Award for Best Screenplay Adaptation.

The film was released in Hong Kong with Cantonese dubbing provided by Lau for his own role, Anthony Wong for the role of Uncle Li, and Chapman To for the role of Sha Gen.

The plot is centered on a naïve village boy who does not believe in the existence of thieves. Returning home on board a train with his savings, he soon becomes the target of many thieves. The film explores the theme of the fundamental human goodness and also addresses humorously the issue of thievery on public transport in Mainland China.