The present invention provides an installation structure of exterior wall decorative sheet (1) possible for easily installing a wall surface (W) of the exterior wall decorative sheet (1), preventing the exterior wall decorative sheet (1) from moving upwards. It includes a plurality of solar panels (3), which is an exterior wall decorative sheet (1), a lower runner (2) holding the plurality of solar panels (3) at a lower side thereof, and an upper runner (2) holding the plurality of solar panels (3) at an upper side. The upper runner (2) includes a fixed portion (21) fixed to the wall surface (W), a rotating portion (22) attaching a base side thereof vertically and rotatably to the fixed portion (21), and an upper engaging portion (23) provided in a tip side of the rotating portion (22), engaged with the solar panel (3) by rotating the rotating portion (22) downwards, and disengaged with the solar panel (3) by rotating the rotating portion (22) upwards.