A solar cell comprising: a photoelectric converter (110, 20, 30); a first electrode connected to the photoelectric converter on a light incident surface of the photoelectric converter; and a second electrode connected to the photoelectric converter on a back surface of the photoelectric converter, wherein the first electrode includes: a finger electrode including a plurality of finger electrode portions; and a bus bar electrode including a main portion formed in a direction crossing the plurality of finger electrode portions, and at least one protrusion laterally protruding on the light incident surface from the main portion in the direction parallel to the finger electrode portions, wherein the at least one protrusion is formed across at least two of the finger electrode portions, wherein the at least one protrusion includes end protrusions (248a, 248b) respectively located at opposite ends of the main portion, characterized in that a protruding length from the end of the protrusion to the main portion in a direction parallel to the finger electrode portions is less than a width of the main portion parallel to the finger electrode, wherein the protrusion protrudes laterally away from the main portion symmetrically in both directions parallel to the finger electrode portions, and wherein the finger electrode further includes an align mark portion formed in a direction crossing the plurality of finger electrode portions at a position corresponding to a periphery of the at least one protrusion. a photoelectric converter (110, 20, 30); a first electrode connected to the photoelectric converter on a light incident surface of the photoelectric converter; and a second electrode connected to the photoelectric converter on a back surface of the photoelectric converter, wherein the first electrode includes: a finger electrode including a plurality of finger electrode portions; and a bus bar electrode including a main portion formed in a direction crossing the plurality of finger electrode portions, and at least one protrusion laterally protruding on the light incident surface from the main portion in the direction parallel to the finger electrode portions, a finger electrode including a plurality of finger electrode portions; and a bus bar electrode including a main portion formed in a direction crossing the plurality of finger electrode portions, and at least one protrusion laterally protruding on the light incident surface from the main portion in the direction parallel to the finger electrode portions, wherein the at least one protrusion is formed across at least two of the finger electrode portions, wherein the at least one protrusion includes end protrusions (248a, 248b) respectively located at opposite ends of the main portion, characterized in that a protruding length from the end of the protrusion to the main portion in a direction parallel to the finger electrode portions is less than a width of the main portion parallel to the finger electrode, wherein the protrusion protrudes laterally away from the main portion symmetrically in both directions parallel to the finger electrode portions, and wherein the finger electrode further includes an align mark portion formed in a direction crossing the plurality of finger electrode portions at a position corresponding to a periphery of the at least one protrusion.