Janel Tsai (born 14 March 1975) is a Taiwanese actress and model. She is known for portraying He Ailin in The Fierce Wife (2011) and Yang Chien in ' (2015). In 2020, she won Best Supporting Actress in a Television Series at the 55th Golden Bell Awards for her portrayal of Tang Juan in Hate the Sin, Love the Sinner. In 2023, she won Best Leading Actress in a Television Series at the 58th Golden Bell Awards for her portrayal of Liu Zi-xu in Mad Doctor.
Tsai was born on 14 March 1975 in Taichung, Taiwan. Her mother is from Wuqi, Taichung. Growing up, she spoke Taiwanese with her mother. She attended Yudah High School of Commerce in Taipei with a focus in Japanese.
Tsai began her modeling career after a friend invited her to a photo shoot. Initially, she planned to retire at 28, but the growing popularity of model/actress Lin Chi-ling gave her the opportunity to try acting. She has since acted in a variety of television shows, films, miniseries, and music videos.
In 2017, Tsai was diagnosed with myofascial pain syndrome and paused acting for a year.
She dated actor Patrick Lee from 2012 to 2020.