A power generation module connected body (10, 10a, 10a', 10b, 10c, 10d), comprising: a plurality of flat power generation modules (P, P') arranged in a matrix of m rows and n columns, where m ≥ 2 and n ≥ 2, with said plurality of flat power generation modules being mechanically and electrically connected by a connection portion in a row direction and in a column direction, the connection portion including a plurality of row-direction connection portions which connect together the power generation modules (P, P') that are adjacent in the row direction, and a plurality of column-direction connection portions which connect together the power generation modules (P, P') that are adjacent in the column direction, wherein the power generation module connected body (10, 10a, 10a', 10b, 10c, 10d) is foldable between adjacent power generation modules of the plurality of power generation modules, a first type row satisfying relationships D 1 ≥ 2L and D y ≥ D y-1 + 2L and a second type row satisfying relationships D n ≥ 2L and D y > D y+1 + 2L are alternately included, where D y is a length of the column-direction connection portions measured between edges of the two adjacent power generation modules (P, P') along the column direction in a y-th column, and L is a thickness of whole of the power generation module and the connection portion, the power generation module connected body(10, 10a, 10a', 10b, 10c, 10d) satisfies a relationship E ≤ W C - L, where W C is a length of the power generation module (P, P') along the column direction, and E is a length of the row-direction connection portions along the column direction, and opposing ends in the column direction of the row-direction connection portions do not protrude outward in the column direction beyond any of the power generation modules (P, P') connected together with the row-direction connection portions. a plurality of flat power generation modules (P, P') arranged in a matrix of m rows and n columns, where m ≥ 2 and n ≥ 2, with said plurality of flat power generation modules being mechanically and electrically connected by a connection portion in a row direction and in a column direction, the connection portion including a plurality of row-direction connection portions which connect together the power generation modules (P, P') that are adjacent in the row direction, and a plurality of column-direction connection portions which connect together the power generation modules (P, P') that are adjacent in the column direction, wherein the power generation module connected body (10, 10a, 10a', 10b, 10c, 10d) is foldable between adjacent power generation modules of the plurality of power generation modules, a first type row satisfying relationships D 1 ≥ 2L and D y ≥ D y-1 + 2L and a second type row satisfying relationships D n ≥ 2L and D y > D y+1 + 2L are alternately included, where D y is a length of the column-direction connection portions measured between edges of the two adjacent power generation modules (P, P') along the column direction in a y-th column, and L is a thickness of whole of the power generation module and the connection portion, the power generation module connected body(10, 10a, 10a', 10b, 10c, 10d) satisfies a relationship E ≤ W C - L, where W C is a length of the power generation module (P, P') along the column direction, and E is a length of the row-direction connection portions along the column direction, and opposing ends in the column direction of the row-direction connection portions do not protrude outward in the column direction beyond any of the power generation modules (P, P') connected together with the row-direction connection portions.