Movable grille shutter for vehicle

A movable grille shutter for a vehicle includes a first fin (11) adapted to be provided at a grille opening portion (6) through which ambient air is taken in, a second fin (13) adapted to be provided at the grille opening portion (6) and be arranged so as to be parallel to the first fin (11), a first output shaft (18) arranged on a rotational axis of the first fin (11), a second output shaft (19) arranged on a rotational axis of the second fin (13) so as to rotate in a direction opposite to a rotation of the first output shaft (18), a driving source (30) for supplying a driving force to the first output shaft (18) and the second output shaft (19) and an actuating device (15) for actuating the first fin (11) and the second fin (13) so as to open or close the grille opening portion (6).