There is provided a safety cap which requires manual dexterity for a cover opening operation and is difficult for an infant or the like to open a cover, in which a safety function can be released, as necessary. In the safety cap configured such that a part of an outer circumferential wall of a cap main body is formed on an inward elastically deformable operating plate, a pair of engaging means and engageable with each other are provided on a peripheral wall of a cover connected to the upper portion of the cap main body via a hinge and at the upper portion of the operating plate, respectively, and the engagement is released by elastically deforming the operating plate inward so as to open the cover, the operating plate can be fixed to the cap main body or a neck portion of the container except for the operating plate by the fixing member in the inward deformed state.