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.

Set in 1960s Singapore, Sabariah Mansoor is a young woman who is fascinated with the music of Kassim Selamat, a small-time musician with great talent playing the saxophone.

Nyonya Mansoor tells Sabariah that if she chooses Kassim, she will forfeit all her family's wealth and can never set foot in their house again.

Sabariah still chooses Kassim, so Nyonya Mansoor arranges a quick marriage ceremony for the pair, after which she gives them 5000 ringgit and casts them out of the house.

Kassim eventually reveals his talent with the saxophone, and after being encouraged by Mami and Chombi, starts a new career in music using the stage name "Osman Jailani".

Kassim, under the guise of Osman Jailani, becomes a hit and starts touring around all over Malaya, performing in Penang, Taiping, Ipoh, Kuala Lumpur, Seremban, Malacca, Muar, Batu Pahat, Johor Bahru before arriving in Singapore, where Sabariah and her new husband Dr. Ismadi attend his performance.

[citation needed] In the recent release of the film on VCD, the scene where Kassim Selamat stabs his eyes with forks has been edited.

After Kassim turns away from the camera, the scene then cuts straight to the door opening with Sabariah and Nyonya Mansoor waiting outside.

This refers to the Nyonya Mansoor's belief that Kassim Selamat, a musician, is more lowly than doctors (specifically Dr. Ismadi in the film), as well as magistrates and lawyers.