A cooking device includes a first waveguide to make a microwave emitted into a heating chamber propagate radially in the directions almost parallel with the bottom face of the heating chamber and to guide the microwave propagated in the almost parallel directions into the heating chamber, and a second waveguide to make the microwave guided into the heating chamber by the first waveguide further propagate radially in directions almost parallel with the bottom face and to guide the propagated microwave into the heating chamber.