Siti Mastura binti Muhammad (born 27 August 1989) is a Malaysian politician who has served as the Member of Parliament (MP) for Kepala Batas since November 2022.

[1] During her tenure as MP for Kepala Batas, she made allegations against Lim Guan Eng on his family ties with the first Singaporean Prime Minister Lee Kuan Yew and Malayan Communist Party leader Chin Peng.

Lim Guan Eng, the DAP MP for Bagan criticised Siti Mastura's claim, stating: "This is not just a personal attack but has racial undertones as well.

[3][4] After both parties failed to reach an agreement at a court-ordered mediation, the case is set for trial in September 2024.

Mastura has maintained that her allegations are true, citing statements from a Barisan Nasional election pamphlet as evidence.