To provide a rice washing/cooking machine removing negative effects such as deterioration in eating quality of cooked rice due to water vapor generated from a rice cooking pot, and defacement of the rice cooking device body due to dew condensation.

A rice washing/cooking machine includes a rice washing tank 3 that is located at an upper part of a rice cooking pot 6 to be heated by a pot heating burner 7 and feeds washed rice to the rice cooking pot 6. The rice washing/cooking machine further includes: a heat insulation material 67 detachably attached to the outer periphery of a hopper-like part 3c of the rice washing tank 3; an annular receiving body 66 provided at a lower end of the hopper-like part 3c of the rice washing tank 3 for receiving the heat insulation material 67; and an inspection window 3a provided at a part higher than a winding position of the heat insulation material 67 for visualizing the inside of the rice washing tank 3.