Abstract: A push button switch includes a case consisting of an upper case member and a lower case member, a stem vertically movably provided in the case, and a switch element for effecting on-and-off operation of the switch by vertical movement of the stem. A holding structure for the switch element has a first projection formed at an upper end of a frame of the switch element, a second projection formed around a terminal of the switch element, a projection insert hole formed through the upper case member and engaged with the first projection, and a terminal insert hole formed through the lower case member and engaged with the second projection.