Tan Sri Dato' Mohamad Ariff bin Md Yusof (Jawi: محمد عارف بن مد يوسف; born 1949) is a Malaysian politician who served as Speaker of the Dewan Rakyat, the lower chamber of the Parliament of Malaysia from July 2018 to his removal from speakership in July 2020. He is a member of the National Trust Party (AMANAH), a component party of the Pakatan Harapan (PH) opposition coalition. He resigned from all AMANAH party positions but not membership to become more impartial after being appointed to the Dewan Rakyat speakership. Therefore, he remains an AMANAH ordinary member.