PURPOSE: To eliminate an uneveness in heating in a model having a different specification and enable component parts to be made commonly used.

CONSTITUTION: In a microwave oven comprising a plurality of rollers 16 arranged at an equal distance from a center of rotation of a rotating pan 9 and for rotatably supporting the rotating pan 9 and a rotating motor 4 for rotating the rotating pan 9, there are provided a supporting means 2 for supporting each of the rollers 16 in such a manner that a distance from the center of rotation of each of the rollers 16 may be varied, and a variable means 11 in which a height of the rotating pan 9 is changed in response to a position of each of the rollers 16 supported by the supporting means 2.