Ming-Jer Tsai (Chinese: 蔡明哲) is a Taiwanese cell biologist.
Tsai was born in Qingshui, Taichung, the third of six children, and lived there until the age of 10.[1] He attended middle school in Kaohsiung, then moved to Taipei for high school and college,[1] graduating from National Taiwan University in 1966.[1][2] Subsequently, he relocated to the United States, earning a doctorate at the University of California, Davis in 1971.[2][3] Tsai was a postdoctoral researcher at MD Anderson Cancer Center until 1973, when he began teaching at Baylor University.[2][3] He held Baylor's Charles C. Bell Jr. Professorship in Cell Biology from 1998 until his retirement.[2][3] Tsai was elected a member of Academia Sinica in 2010.[2]