Abstract: A movable grille shutter for a vehicle includes a fin adapted to be provided at a grille opening portion and being operated so as to freely open or close the grille opening portion through which ambient air is taken in, a drive source for driving the fin, a driving force transmitting mechanism for transmitting a driving force from the drive source to the fin and a flexible member being linked to the driving force transmitting mechanism and being deformed for operating the fin to open the grille opening portion in a case where a load that is equal to or more than a predetermined value is acted thereon.