Abstract: A microwave oven is provided, which includes a microwave generator and a wave guide through which a microwave from the generator is guided into a cavity such that an object charged in the cavity is heated. The microwave oven comprises a uniform heating apparatus. The apparatus includes a guide plate mounted on an inner wall of the cavity and connected to the wave guide, a guide space defined between the guide plate and the inner wall of the cavity and adapted to change the microwave discharged from the wave guide into a standing wave, and a fan disposed in the guide space and adapted to disperse the standing wave into the cavity.