An operating switch mechanism in an IC recorder having an operating switch button for slide operation includes an IC recorder main body and an operating unit. The operating unit is attached to the main body by fixing a frame member on the operating unit side with a screw hole of a groove portion. The operating unit includes an operating switch button, a slide plate which switches-on/off switches, and a click spring member which holds a rubber roller. The rubber roller is abutted against a projected portion, a cam surface and an inclined can surface of an inner cam surface portion arranged on the main body side, and the operating switch button is held at the click determining position. The operating switch mechanism is used for an electronic device with high maintenance performance.