To provide a room lamp lighting control circuit that is able to judge of whether a door is completely closed or not at once, whereas it has a delayed light-out function in a room lamp.

This room lamp lighting control circuit is equipped with a white illuminating lamp 20A to be used as a normal service lamp, a colored illuminating lamp 20B to be used as a residual illuminating lamp, a transfer switch 21 switching the white illuminating lamp 20A in an interval between the normal service lamp side and the lighting side in time of door opening, and an off-delay circuit 22 lighting the white illuminating lamp 20A if a door is opened when the transfer switch 21 is selected to the lighting side in time of door opening, and further, making the white illuminating lamp 20A, being lighted if the door is closed, go out simultaneously lighting the colored illuminating lamp 20B, but after the elapse of the prescribed time, making the colored illuminating lamp 20B go out, respectively.