A child resistant safety cap having a cover and a safety mechanism by which finger dexterity is required to open the cap, while the safety mechanism capable of being released if it is unnecessary. The cap comprises a cap body 1 having a skirt 3 with at least one stopping piece 9 at one side thereof. The stopping piece 9 has a base end fixed to a lower portion of the skirt 3 such that the stopping piece is pushable inwardly and swayable about the base end. The leading end portion of the stopping piece 9 is confronting at its outside with the insides of an outer tube 14 of the cover, and first and second engagement means 10, 18 are provided at confronting sides of the stopping piece 9 and the outer tube 14 for providing mutual engagement, such that when the stopping piece 9 is in an initial position, the first and second engagement means 10, 18 are engaged unless the stopping piece 9 is pushed inwardly against its elasticity. The stopping piece is adapted to move to a second position where the first and second engagement means are separated without pushing the stopping piece.