An occupant protection apparatus includes a cover sheet adapted to be fed out from a peripheral edge of a window of a vehicle, when a pulling unit is activated, so as to cover the window. The pulling unit includes a pulling string having flexibility and a pulling device to which the pulling string is connected so as to be pulled thereby and which is disposed below the window. When the pulling device is activated, the pulling string is pulled such that a portion thereof which extends from a fixed end to where it is supported by a support member becomes a straight line while a portion thereof which is disposed along a lower edge portion of the peripheral edge of the window is caused to rise. The cover sheet includes a passageway portion through which the pulling string is passed on an upper side part thereof and is folded to be accommodated in the window only along the lower edge side of the peripheral edge thereof with the portion of the pulling string which has not yet been activated inserted into the passageway portion so as to be staying therein.