A closing device of a hinged door, wherein a locking body (38) is disposed upward-movably at an opening (36) with a flange part (38b) larger than the opening (36) positioned inside a case (33) installed on a storing device main body (31), a spherical body (37) is stored in each moving space (34) in the case (33), and an elastic piece (43) which forms a locking path (42) at the tip of a supporting body (41) on a hinged door (32) side, forms an ascending sloped surface (43a), and has a tip side having an upward elastic force larger than the weight of a locking body (38) is formed integrally in front of the locking part (42) of the supporting body (41), whereby at least one spherical body (37) is put on the upper surface of flange part (38b) so as to stop the locking body (38) from moving upward at the time of earthquake, and the locking body (38) pushes down the elastic piece (43) so as to enable it to be locked to the locking part (42) to control the hinged door (32) to a degree that it can be opened slightly.