The King's Doctor (Korean: 마의; Hanja: 馬醫; RR: Ma-ui; lit. Horse Doctor) is a 2012 South Korean television series depicting Baek Gwang-hyeon (1625–1697), Joseon Dynasty veterinarian, starring Cho Seung-woo and Lee Yo-won. It aired on MBC from October 1, 2012 to March 25, 2013 on Mondays and Tuesdays at 21:55 for 50 episodes. The historical/period epic drama commemorated MBC's 51st anniversary.

Filmed at MBC Dramia in Gyeonggi Province, The King's Doctor was directed by Lee Byung-hoon, known for his previous works Hur Jun, Jewel in the Palace, Yi San and Dong Yi. This marked the first television drama for actor Cho Seung-woo in his 13-year film and stage career.