In Egyptian Mythology Hapy was one of the four sons of Horus (The other three were Imsety, Duamutef and Qebehsenuef). They were given the funerary duties of mummification, the Opening of the Mouth, the burial of Osiris and all men by Anubis. In addition to this they were responsible for protecting the internal organs of the deceased - their images appear on the canopic jars that were used to contain organs removed during mummification. Hapy was responsible for the lungs. They also protected the four directions: north, south, east and west. Hapy protected north.

Hapy is usually depicted as a mummy with the head of a baboon.