A grille shutter device selectively opening and closing a grille opening in the front grille of a vehicle. The grille shutter device includes a fin, a motor, a transmission mechanism, a first switch, and a second switch. The fin has a support shaft, which is rotatably supported by the front grille. When supplied with electricity, the motor rotates its output shaft in one direction. The transmission mechanism converts the rotation of the output shaft to a swinging motion of the fin, thereby swinging the fin between a closed position, where the fin closes the grille opening, and an open position, where the fin opens the grille opening. When the fin is swung to the closed position, the first switch stops the motor. When the fin is swung to the open position, the second switch stops the motor.