To provide a printed wiring board fixing structure wherein the operation of a switch used for the printed wiring board and the fixing operation can be carried out quickly and easily in a single operation.

In the printed wiring board fixing structure for fixing the printed wiring board 1 to a housing 30, when fixing means 10, 13, 31 for fixing the board 1 to the housing 30 or releasing the fixed state by operating an operating part 11 and the operating part 11 of the fixing means 11, 13, 31 are operated, an operating part 4 of a switch mounted on the printed wiring board 1 is operated simultaneously. The switch is turned on when the printed wiring board 1 is fixed to the housing 10, and the switch is turned off when the fixed state of the board 1 to the housing 30 is released.