To provide a timer switch capable of automatically carrying out switching on and off of various electric equipments including an air-conditioner.

The timer switch 10 comprises a power source, a regulator 12 to set a power source voltage to a prescribed voltage, a timer circuit 14 to output a pulse at a set time, a setting circuit 16 for setting the time of the timer circuit 14, a switching element 18 which is switched on by being inputted with the pulse, a solenoid coil 20 which is turned on while the switching element 18 is switched on, a magnetic body which moves by the magnetic field generated by turning on the solenoid coil 20 and presses a button, and a spring member installed on the magnetic body and putting the magnetic body back to an original position after the magnetic field is extinguished.