Wutou gui (traditional Chinese: 無頭鬼; simplified Chinese: 无头鬼; pinyin: wútóu guǐ; literally "headless ghost") are headless ghosts who roam about aimlessly. They are the spirits of people who were killed by decapitation due to various causes (e.g. execution, accident etc). In some tales, the wutou gui will approach a person at night and ask the person where his/her head is. The wutou gui is sometimes depicted as carrying his/her head on the side.
Read more about this topic: List Of Supernatural Beings In Chinese Folklore