To provide a safety thumbtack or pin which is prevented from being left with its sharp pinhead turned up or left in a dangerous state even when it is dropped and lost due to its small size.

A semi-circular lug (2) is formed in the upper part of an elliptic bed plate (1) to be unified with the bed plate by using a plastic material. The bottom surface of the elliptic bed plate is formed in the shape of a boat, and a pin (3) is set in the central lower part of the elliptic bed plate (1) formed in the shape of the bottom of a boat.