A sunshade apparatus comprising: a light blocking sheet configured to block light at an opening formed in a vehicle and open the opening to light; a winding member to which a first edge portion serving as an opening side edge portion of the light blocking sheet in an operating direction of the light blocking sheet is fixed and which is configured to be capable of winding and unwinding the light blocking sheet; a pair of turning members disposed on both sides of the opening in the width direction; an urging member configured to urge the winding member to rotate, characterized in that it comprises: a single rope member which is adjustably engaged with a second edge portion serving as a blocking side edge portion of the light blocking sheet in the operating direction of the light blocking sheet, extends from both end portions of the second edge portion respectively toward the light-blocking side in the operating direction of the light blocking sheet, and turns at both of the turning members respectively toward the opening side in the operating direction of the light blocking sheet, and whose both side terminals are respectively fixed to both end portions of the winding member so as to be capable of being wound and unwound by the winding member, the rope member being fixed to the second edge portion via an operating member fixed to the second edge portion; - an engaging portion provided on the rope member; and - a restricting portion which is formed on the operating member, and to which the engaging portion is loosely fitted to restrict a displacement of the rope member along the second edge portion within a fixed range, and in that the operating member includes a supporting groove extending in the longitudinal direction thereof, the rope member is guided in the supporting groove, and the operating member includes guide surfaces configured to guide the rope member coming out from the supporting groove toward the turning members provided at both end portions thereof in the longitudinal direction, and hook portions configured to prevent the rope member from coming apart on the guide surfaces. a light blocking sheet configured to block light at an opening formed in a vehicle and open the opening to light; a winding member to which a first edge portion serving as an opening side edge portion of the light blocking sheet in an operating direction of the light blocking sheet is fixed and which is configured to be capable of winding and unwinding the light blocking sheet; a pair of turning members disposed on both sides of the opening in the width direction; an urging member configured to urge the winding member to rotate, - an engaging portion provided on the rope member; and - a restricting portion which is formed on the operating member, and to which the engaging portion is loosely fitted to restrict a displacement of the rope member along the second edge portion within a fixed range, and in that the operating member includes a supporting groove extending in the longitudinal direction thereof, the rope member is guided in the supporting groove, and the operating member includes guide surfaces configured to guide the rope member coming out from the supporting groove toward the turning members provided at both end portions thereof in the longitudinal direction, and hook portions configured to prevent the rope member from coming apart on the guide surfaces.