Mae Nak Phra Khanong, or simply Mae Nak or Nang Nak, is a well-known Thai ghost. According to local folklore the story is based on events that took place during the reign of King Rama IV.

Belief in ghosts in Thai culture is both popular and enduring. In the history of Thailand, Buddhist popular beliefs intermingled with legends of spirits or ghosts of local folklore. These myths have survived and evolved, having been adapted to the modern media, such as Thai films, Thai television soap operas, and Thai comics.