A sunshade apparatus includes: a light blocking sheet to block light at an opening of a vehicle and open the opening; a winding member to which a first edge of the sheet is fixed and which is capable of winding and unwinding the sheet; turning members disposed on both sides of the opening in the width direction; a single rope member adjustably engaged with a second edge of the sheet in the operating direction, extending from both end portions of the second edge respectively toward the light-blocking side in the operating direction, and turning at both of the turning members respectively toward the opening side in the operating direction, and whose both side terminals are respectively fixed to both end portions of the winding member to be capable of being wound and unwound by the winding member; and an urging member to urge the winding member to rotate.