A solar cell array (101, 201, 301, 401, 501, 601, 701) comprising: a plurality of solar cell modules arrayed along at least one of an X-direction and a Y-direction perpendicular to the X-direction in a not-overlapped state with rear surfaces of the solar cell modules being directed downwards; and a mounting member arranged between corners of the solar cell modules adjacent to each other, the mounting member including: a first member extending in the Y-direction: a second member located on the first member and including a support portion supporting the rear surface of the solar cell module; a third member located on the second member and including a clamping portion clamping the solar cell module in cooperation with the support portion of the second member; and a fixing member vertically penetrating through the second member and the third member and fixing the second member and the third member to the first member, the second member and the third member being movable along the Y-direction, wherein the first member has an elongate shape with the Y-direction, being a lengthwise direction thereof, and before the second member and the third member are fixed to the first member by the fixing member, the second member is movable in the Y-direction and the third member is movable in the X-direction and the Y-direction, characterized in that the second member includes, in a second principal surface thereof facing the third member, a second guide portion guiding movement of the third member in the X-direction with respect to the second member, and the third member includes a through-hole through which the fixing member is inserted and which is elongated in the X-direction, the through-hole allowing the third member to be moved in the X-direction before the third member is fixed to the first member. a plurality of solar cell modules arrayed along at least one of an X-direction and a Y-direction perpendicular to the X-direction in a not-overlapped state with rear surfaces of the solar cell modules being directed downwards; and a mounting member arranged between corners of the solar cell modules adjacent to each other, the mounting member including: a first member extending in the Y-direction: a second member located on the first member and including a support portion supporting the rear surface of the solar cell module; a third member located on the second member and including a clamping portion clamping the solar cell module in cooperation with the support portion of the second member; and a fixing member vertically penetrating through the second member and the third member and fixing the second member and the third member to the first member, the second member and the third member being movable along the Y-direction, wherein the first member has an elongate shape with the Y-direction, being a lengthwise direction thereof, and before the second member and the third member are fixed to the first member by the fixing member, the second member is movable in the Y-direction and the third member is movable in the X-direction and the Y-direction, characterized in that the second member includes, in a second principal surface thereof facing the third member, a second guide portion guiding movement of the third member in the X-direction with respect to the second member, and the third member includes a through-hole through which the fixing member is inserted and which is elongated in the X-direction, the through-hole allowing the third member to be moved in the X-direction before the third member is fixed to the first member. a first member extending in the Y-direction: a second member located on the first member and including a support portion supporting the rear surface of the solar cell module; a third member located on the second member and including a clamping portion clamping the solar cell module in cooperation with the support portion of the second member; and a fixing member vertically penetrating through the second member and the third member and fixing the second member and the third member to the first member, the second member and the third member being movable along the Y-direction, wherein the first member has an elongate shape with the Y-direction, being a lengthwise direction thereof, and before the second member and the third member are fixed to the first member by the fixing member, the second member is movable in the Y-direction and the third member is movable in the X-direction and the Y-direction, characterized in that the second member includes, in a second principal surface thereof facing the third member, a second guide portion guiding movement of the third member in the X-direction with respect to the second member, and the third member includes a through-hole through which the fixing member is inserted and which is elongated in the X-direction, the through-hole allowing the third member to be moved in the X-direction before the third member is fixed to the first member.