Qin Siyu (born 2 May 1994) is a Chinese female volleyball player. She was part of the China women's national volleyball team. She participated in the 2013 FIVB Volleyball Women's U20 World Championship, 2015 Montreux Volley Masters, 2015 FIVB Volleyball Women's U23 World Championship, and 2019–20 Chinese Women's Volleyball Super League.