Doo Hoi Kem (Chinese: 杜凱琹; born 27 November 1996) is a Hong Kong table tennis player.

In 2021, she also won bronze in the women's team event with Lee Ho Ching and Minnie Soo Wai Yam at the 2020 Summer Olympics.

After completing Secondary Three at the age of 15, she chose to become a full-time athlete and entered the Hong Kong Institute of Sports for training.

At the 2016 Summer Olympics, Doo competed in the team event along with Lee Ho Ching and Tie Ya Na.

[6] In the 2020 Summer Olympics, Doo reached the quarter-finals in the women's single event where she lost to top seed Chen Meng after leading 2–0.