A solar cell module comprising: a plurality of solar cells, each solar cell comprising a substrate, a back electrode comprising a plurality of openings that extend through the entire thickness of the back electrode and positioned at the back surface of the substrate, and a back electrode current collector positioned at at least one of the plurality of openings; a plurality of interconnectors for electrically connecting adjacent solar cells; and a conductive adhesive film positioned between the interconnector and the back electrode current collector, and electrically connecting the interconnector and the back electrode current collector, wherein the back electrode is formed on the entire back surface of the substrate except for a portion at which the back electrode current collector is positioned, wherein the length of the conductive adhesive film is longer than the length of the back electrode current collector, wherein the conductive adhesive film comprises a first portion contacting the back electrode current collector and a second portion positioned at the outside of the back electrode current collector in a length direction of the back electrode current collector, wherein the second portion of the conductive adhesive film contacts the back electrode positioned at the outside of the back electrode current collector in a length direction of the back electrode current collector, wherein the thickness of the back electrode is greater than the thickness of the back electrode collector, and wherein the width of the back electrode current collector is the same as the width of the at least one of the plurality of openings. a plurality of solar cells, each solar cell comprising a substrate, a back electrode comprising a plurality of openings that extend through the entire thickness of the back electrode and positioned at the back surface of the substrate, and a back electrode current collector positioned at at least one of the plurality of openings; a plurality of interconnectors for electrically connecting adjacent solar cells; and a conductive adhesive film positioned between the interconnector and the back electrode current collector, and electrically connecting the interconnector and the back electrode current collector, wherein the back electrode is formed on the entire back surface of the substrate except for a portion at which the back electrode current collector is positioned, wherein the length of the conductive adhesive film is longer than the length of the back electrode current collector, wherein the conductive adhesive film comprises a first portion contacting the back electrode current collector and a second portion positioned at the outside of the back electrode current collector in a length direction of the back electrode current collector, wherein the second portion of the conductive adhesive film contacts the back electrode positioned at the outside of the back electrode current collector in a length direction of the back electrode current collector, wherein the thickness of the back electrode is greater than the thickness of the back electrode collector, and wherein the width of the back electrode current collector is the same as the width of the at least one of the plurality of openings.