To provide an operation condition setting type microwave oven and its operation condition setting method and its retrieval method.

A key input part 300 is constituted by a membrane key pad in which at least one operation condition of a microwave oven set is set depending on whether a contact seat is formed for at least one key pad out of a plurality of key pads at the time of manufacturing. A control part 100 retrieves whether a key signal fed from the operation condition setting key pad of the key input part 300 is inputted or not at the time of supplying an initial power source to the microwave oven set, and sets the operation condition of the microwave range to the preliminarily set operation conditions, and controls the cooking operation of the microwave oven in accordance with the operation condition as set in the above-mentioned manner. Accordingly, the capacity of the control part 100 can be reduced, the area for PCB substrate can be ensured, the cost and man-hour are reduced and the administration of mass production is facilitated.