Kwai Chang Caine (Chinese: 虔官昌; pinyin: Qián Guānchāng) is a fictional character and the protagonist of the ABC 1972–1975 action-adventure western television series Kung Fu.^[2] He has been portrayed by David Carradine as an adult, Keith Carradine as a younger Caine and Radames Pera as the child Caine, and Stephen Manley as the youngest Caine.

In the late 19th century China, Kwai Chang Caine was the orphaned son of an American man and a Chinese woman. He was raised in a Shaolin Monastery in Hunan Province, and was trained by the monks to be a Shaolin master. Kung Fu follows his adventures as he travels to the American Old West (armed only with his skill in martial arts) as he seeks his half-brother, Danny Caine. Although it was his intention to find his brother Danny in a way which would escape notice, the demands of his training as a priest in addition to the sense of social responsibility, which was instilled within him during his childhood, forced Caine to repeatedly come into the open to fight for justice. He would then leave his new surroundings in a further search for anonymity and security.

In the Shaolin arts, monks live in temples and most stay their entire life. Once they become masters and leave the temple, they are referred to as Priests. In real world Shaolin, both monks and priests shave their heads and remain celibate. Western audiences might have expected that such a character had taken a vow of chastity, but that was apparently not true in Caine's case as he frequently had intimate relations with women throughout the series.