Xi Xiaobo (1910–1977) was a Peking opera singer.

Xi was best known for his "old man" roles (老生, lǎoshēng) and was considered one of Peking Opera's "Four Great Beards" (t 四大鬚生, s 四大须生, p Sì Dà Xūshēng), along with Tan Fuying, Yang Baosen, and Ma Lianliang. He served as a mentor to Li Yuru.^[1]

• Li Ruru (2010), "2010 Commemorations of the Theatrical Careers of Cao Yu and Li Yuru" (PDF), CHINOPERL Papers, vol. 29, Conference on Chinese Oral and Performing Literature.

• "奚啸伯" on Baike.com (in Chinese)