Mas Ermieyati binti Samsudin is a Malaysian politician and lawyer who has served as Chairperson of the Public Accounts Committee (PAC) since April 2023 and as the Member of Parliament (MP) for Masjid Tanah since May 2013. She served as Deputy Minister in the Prime Minister's Department in charge of Parliament and Law in the Barisan Nasional (BN) administration under former prime minister Ismail Sabri Yaakob and former Minister Wan Junaidi Tuanku Jaafar from August 2021 to the collapse of BN administration in November 2022, Deputy Minister of Entrepreneur Development and Cooperatives in the Perikatan Nasional (PN) administration under former Prime Minister Muhyiddin Yassin and former Minister Wan Junaidi Tuanku Jaafar from March 2020 to the collapse of the PN administration in August 2021 and the Deputy Minister of Tourism and Culture in the BN administration under former Prime Minister Najib Razak and former Minister Mohamed Nazri Abdul Aziz from July 2015 to the collapse of the BN administration in May 2018. She is a member and the Women Chief of the Malaysian United Indigenous Party (BERSATU), a component party of the PN coalition and was a member of United Malays National Organisation (UMNO), a component party of the BN coalition. She has previously served as the 2nd Vice Women Chief of BERSATU from August 2020 to October 2024 and the Women Youth Chief of UMNO from October 2013 to June 2018. After the defeat of BN to the Pakatan Harapan (PH) opposition coalition in the 2018 general election, she resigned from UMNO in 2018 and joined BERSATU in 2019. She is also the second female PAC Chairperson after Noraini Ahmad in Malaysian history.