To provide a chest falling prevention device safely used by being inclined corresponding to the extent of the vibration by earthquake and used beautifully by provided with no legs and (generally) being invisible from the front (vicinity) in the device which has a lock device projecting by a dimension of the front part of the chest floated from a floor in the earthquake and makes the chest into a rearward inclined state to prevent the chest from falling frontward.

This chest falling prevention device comprises a base having a projecting cylindrical body formed by providing a lock pin in the central part in the lower surface of a base board; a support body provided in the center of the base board and formed with a female screw part in the upper part and a pull-out prevention part in the lower part, respectively; a connecting body provided in the support body and formed with a male screw part in the upper part and a male screw shaft in the lower part respectively; a lock device attached to the male screw shaft of the connecting body and formed by providing a lock piece in the outer circumference and a receiving part in the lower part; and an elastic body formed by provided in the cylindrical body.