PURPOSE: To thin a casing and enhance operability by making the structure of a push-switch with a variable resistor thinner.

CONSTITUTION: Let a transmitting system for rotating operations be made up of an operating grip 51 in a circular cylinder shape which is rotatably held by an upper casing 11a, and is also held by the surface of the casing in such a way as to be freely moved, a first rotating gear 51a provided in a level with respect to the surface of the casing, and of a second rotating gear 43. A minute space is provided over the conductor patterns of a printed substrate 1 so as to allow an elastic body 55 to be disposed therein wherein a variable resistor section 40 is formed, which is held by a lower casing 11b, and is composed of a pair of the aforesaid conductor patterns 56a and 56b located below an operating grip 1, and of a coaxial circle around the rotating axis of a second rotating gear 53a. Touching the operating grip 51 by an operator causes connection between conductors to be made, and rotating operations cause the sliding contact point 47 of the variable resistor section 40 to make the shortcircuiting positions of an incenter circle and a circumcenter circle variable.