<p>A grille shutter apparatus (10) includes a shutter mechanism (11) arranged in an grille opening portion (7) positioned at a front portion of a vehicle body (2) of a vehicle (1) to control a flow rate of air flowing from the grille opening portion (7) to an internal portion of the vehicle body (2), and a frame (13) supporting the shutter mechanism (11) in the grille opening portion (7), the frame (13) including a fixing portion (F) at one end to be fixed in the grille opening portion (7), the frame (13) including a protruding portion (26) making contact with a front grille (9) and generating a rotational moment at the frame (13) in a case where the front grille (9) arranged at an opening end (7a) of the grille opening portion (7) moves rearward due to an occurrence of a collision of the vehicle (1), the rotational moment acting about the fixing portion (F).</p>
