A solar cell module comprising: a first solar cell group including a plurality of solar cells connected by a plurality of first line members; a second solar cell group including a plurality of solar cells connected by a plurality of first line members; a front surface member disposed on a front surface side of the first solar cell group and the second solar cell group; a back surface member disposed on a back surface (1b, 3a) side of the first solar cell group and the second solar cell group; one or more first terminal boxes (21, 24) disposed on a back surface (1b, 3a) side of the back surface member and each including one or more bypass diodes (30a-30f) connected to the first solar cell group; one or more second terminal boxes (22, 25) disposed on the back surface (1b, 3a) side of the back surface member and each including one or more bypass diodes (30a-30f) connected to the second cell group; and an external line disposed on the back surface (1b, 3a) side of the back surface member and electrically connecting at least one first terminal box (21, 24) among the one or more first terminal boxes (21, 24) and at least one second terminal box (22, 25) among the one or more second terminal boxes (22, 25), wherein the first solar cell group includes a plurality of first solar cell strings each of which includes, among the plurality of solar cells, a plurality of solar cells connected by one of the plurality of first line members, the plurality of first solar cell strings being connected by a second line member (31-33, 35-41, 71-77, 79, 81), the second solar cell group includes a plurality of second solar cell strings each of which includes, among the plurality of solar cells, a plurality of solar cells connected by one of the plurality of first line members, the plurality of second solar cell strings being connected by a second line member (31-33, 35-41, 71-77, 79, 81), and one of the plurality of first solar cell strings included in the first solar cell group and one of the plurality of second solar cell strings included in the second solar cell group are connected by a third line member (34, 80). a first solar cell group including a plurality of solar cells connected by a plurality of first line members; a second solar cell group including a plurality of solar cells connected by a plurality of first line members; a front surface member disposed on a front surface side of the first solar cell group and the second solar cell group; a back surface member disposed on a back surface (1b, 3a) side of the first solar cell group and the second solar cell group; one or more first terminal boxes (21, 24) disposed on a back surface (1b, 3a) side of the back surface member and each including one or more bypass diodes (30a-30f) connected to the first solar cell group; one or more second terminal boxes (22, 25) disposed on the back surface (1b, 3a) side of the back surface member and each including one or more bypass diodes (30a-30f) connected to the second cell group; and an external line disposed on the back surface (1b, 3a) side of the back surface member and electrically connecting at least one first terminal box (21, 24) among the one or more first terminal boxes (21, 24) and at least one second terminal box (22, 25) among the one or more second terminal boxes (22, 25), wherein the first solar cell group includes a plurality of first solar cell strings each of which includes, among the plurality of solar cells, a plurality of solar cells connected by one of the plurality of first line members, the plurality of first solar cell strings being connected by a second line member (31-33, 35-41, 71-77, 79, 81), the second solar cell group includes a plurality of second solar cell strings each of which includes, among the plurality of solar cells, a plurality of solar cells connected by one of the plurality of first line members, the plurality of second solar cell strings being connected by a second line member (31-33, 35-41, 71-77, 79, 81), and one of the plurality of first solar cell strings included in the first solar cell group and one of the plurality of second solar cell strings included in the second solar cell group are connected by a third line member (34, 80).