Hey Boy is the nickname used for the character Kim Chan, played by actor Kam Tong, in the 1950s-60s TV western Have Gun - Will Travel. Hey Boy was the Chinese porter at the Carlton Hotel in San Francisco, where Paladin lived, and was Paladin's close friend as well. He appeared in nearly every episode except in the fourth season, in which he was replaced by his sister Hey Girl, played by Lisa Lu.
Perhaps Hey Boy's most memorable appearance in the TV series was in the episode "Hey Boy's Revenge", in which Kim Chan's brother Kim Sung, fresh off the boat from China, is killed mysteriously while working on the railroad to pay off his passage to America. Hey Boy must, with Paladin's help, determine whether Kim Sung's death was truly an accident and, if not, how to bring his killer to justice.
The character Hey Boy in the radio series Have Gun - Will Travel was not voiced by Kam Tong, but by Ben Wright.