To provide a highly convenient, safe and durable electric heater with an excellent heating effect.

This electric heater using I.H (electromagnetic heating) comprises a multi-plate type heating element for enhancing the heating effect set within a cylindrical electromagnetic coil having a good magnetic flux generating effect to use the heating effect by the characteristic of high exchange efficiency from electricity to heat of I.H. The heater further comprises a blowing device using release of warm air and cooling by a electromagnetic coil.