Mej Didi is a 2003 Bengali film directed by Shantimoy Bandyopadhyay and produced by Samrat Banerjee. The film is based on Sarat Chandra Chattopadhyay's short story of the same name. The screenplay and dialogue of the film was written by Shaktipada Rajguru. The film endorses altruism. The plot is set in the early twentieth century. It revolves around an orphan teenager who is oppressed by his unkind stepsister and a woman who shelters him. It stars Debashree Roy in the title role.

The film failed to earn critical favour. Rajguru was criticised for his weak screenplay. The portrayal of Bipin Chatujje was critically panned. While Hemangini is the face of altruism in the original story, the film depicts both Hemangini and her husband Bipin to be altruistic. Ranjit Mallick's performance in the film failed to win critical favour. Despite critical failure, the film was financially successful.