Ibu Mertuaku (Malay: My Mother In-Law) is a 1962 Singaporean Malay-language black-and-white melodrama film directed by and starring silver-screen legend P. Ramlee. The film's story revolves around the tragic love affair between Kassim Selamat, a poor musician, and Sabariah, the only daughter of a wealthy woman.

The movie is notable in that the opening act starts out as a light-hearted romantic comedy, but at the 30 minute mark turns into a dramatic tragedy. Like a number of P. Ramlee's works, the film criticises the unofficial caste system that separates the wealthy from the poor. This film is considered a Malaysian classic, not only for some of its songs - notably "Di Mana Kan Ku Cari Ganti" - but also for its depiction of a famous tragedy-induced eye-stabbing scene during the film's climax.