To obtain an agitator capable of easily and continuously performing agitation without shaking a hand nor securing a power source.

The agitator includes: a handle; and an agitation shaft. The agitation shaft is rotated by vertically moving the handle, so as to utilize its return action. Consequently, fresh cream or dressing, etc., is easily agitated. Since the power source is not required, the agitator is safely and easily used without selecting a place.