A solar module comprising: a plurality of solar cells; and a wiring electrically connecting one of the solar cells to another of the solar cells adjacent to the one solar cell, wherein each of the solar cells comprises: a photoelectric conversion unit; and a first electrode and a second electrode arranged on the photoelectric conversion unit and connected to a wiring via an adhesive layer; the first electrode having a plurality of finger portions and a busbar portion including a linear first busbar portion (21b-1) connected electrically to at least one of the plurality of finger portions of the first electrode and a second busbar portion (21b-2) connected electrically to the finger portions, from among the plurality of finger portions of the first electrode, which are not connected to the first busbar portion (21b-1), the second busbar portion (21b-2) being arranged to the outside of the first busbar portion (21b-1) in a direction of extension of the first busbar portion (21b-1), the second electrode having a plurality of finger portions and a busbar portion including a linear third busbar portion (22b-1) connected electrically to at least one of the plurality of finger portions of the second electrode and a fourth busbar portion (22b-2) connected electrically to the finger portions, from among the plurality of finger portions of the second electrode, which are not connected to the third busbar portion (22b-1), the fourth busbar portion (22b-2) being arranged to the outside of the third busbar portion (22b-1) in a direction of extension of the third busbar portion (22b-1), wherein the electrical resistance of the first busbar portion (21b-1) is higher than the electrical resistance of the second busbar portion (21b-2), and each of the busbar portion of the first electrode of one solar cell and the busbar portion of the second electrode of the other solar cell has an area covered by the wiring and an area not covered by the wiring. a plurality of solar cells; and a wiring electrically connecting one of the solar cells to another of the solar cells adjacent to the one solar cell, wherein each of the solar cells comprises: a photoelectric conversion unit; and a first electrode and a second electrode arranged on the photoelectric conversion unit and connected to a wiring via an adhesive layer; a photoelectric conversion unit; and a first electrode and a second electrode arranged on the photoelectric conversion unit and connected to a wiring via an adhesive layer; the first electrode having a plurality of finger portions and a busbar portion including a linear first busbar portion (21b-1) connected electrically to at least one of the plurality of finger portions of the first electrode and a second busbar portion (21b-2) connected electrically to the finger portions, from among the plurality of finger portions of the first electrode, which are not connected to the first busbar portion (21b-1), the second busbar portion (21b-2) being arranged to the outside of the first busbar portion (21b-1) in a direction of extension of the first busbar portion (21b-1), the second electrode having a plurality of finger portions and a busbar portion including a linear third busbar portion (22b-1) connected electrically to at least one of the plurality of finger portions of the second electrode and a fourth busbar portion (22b-2) connected electrically to the finger portions, from among the plurality of finger portions of the second electrode, which are not connected to the third busbar portion (22b-1), the fourth busbar portion (22b-2) being arranged to the outside of the third busbar portion (22b-1) in a direction of extension of the third busbar portion (22b-1), wherein the electrical resistance of the first busbar portion (21b-1) is higher than the electrical resistance of the second busbar portion (21b-2), and each of the busbar portion of the first electrode of one solar cell and the busbar portion of the second electrode of the other solar cell has an area covered by the wiring and an area not covered by the wiring.