Abstract: A microwave oven with heater has a wave guide plate between a rotary heater and a wall of a heating chamber on which a bearing for the rotary heater is provided, for controlling microwave to improve distribution thereof, and further, preventing adhesion of scattered food thereby to maintain insulation between the heating chamber on the rotary heater.

Abstract: A holder of the present disclosure is detachably mounted on a container of an object to be heated for releasably holding a temperature detecting device employed in an oven for detecting the temperature of the object during heating. The holder is made of material having low dielectric loss and includes a body, a pair of arm members extending from one side of the body for holding the temperature detecting device and a pair of leg members extending from approximately either side of the body for clamping the rim of the container between the leg members by elastic force of the leg members.