The present invention relates to a cap for fixing a dice and adjusting the length of a needle and, more specifically, to a cap for fixing a dice and adjusting the length of a needle, which is operated in a manner in which a liquid existing in a dice is put into a human body when a center button of the dice is pressed.주사위에 정가운데 버튼을 누르면 주사위 안에있는 액체가 사람몸에 넣어지는 형식