Berkrerk Chartvanchai (Thai: ???????? ??????????, born October 25, 1944) is a former Thai boxer who won the WBA World Flyweight Title on April 5, 1970 against Bernabe Villacampo in a fifteen round split decision at Bangkok, Thailand.
Chartvanchai became the third Thai in history to hold a version of the World Flyweight Title (The first one is Pone Kingpetch, the second is a Chartchai Chionoi).