Tsai Chia-hsin (Chinese: 蔡佳欣; pinyin: Cài Jiāxīn; Wade–Giles: Ts'ai Chia-hsin; born 25 July 1982) is a Taiwanese former badminton player.

[2] Tsai also competed (for the Republic of China as Chinese Taipei) in the 2004 Summer Olympics in mixed doubles with partner Cheng Wen-hsing and in 2016 Summer Olympics in men's doubles with partner Lee Sheng-mu.

In 2004, they defeated Chris Dednam and Antoinette Uys of South Africa in the first round but lost to Zhang Jun and Gao Ling of China in the round of 16.

A season of Superseries consisted of twelve tournaments around the world that had been introduced since 2011.

[5] Successful players were invited to the Superseries Finals, which were held at the end of each year.