to provide a piezoelectric speaker in which a breakdown of an electric lead terminal is prevented when a large amount electric current flows into a thin narrow electrode lead terminal , any electric accident may be prevented in an electrode and a frame that would be likely to be touched by hands , the precision of position and shape of the electrode formed by using a mask is enhanced , and the generation of busy sound that becomes noise may be prevented at a predetermined frequency of the vibrating diaphragm , in the vibrating diaphragm , a side end of the vibrating diaphragm is clamped by wavy surfaces machined in at least one pair of plates to form a side frame the side frame is assembled with a vertical frame to form a frame , electrodes formed on the vibrating diaphragm are connected to each other by leads and the lead are fixed to the frame , whereby the vibrating diaphragm 1 may be firmly fixed to the side frame and concentration of electric current to local position of thin electrode lead terminals may be prevented .