A solar cell module comprising: a solar cell panel including an array of solar cells defining a plurality of outer strings (S1 and S4, S1 and S6) positioned closest to two outer edges of the solar cell panel and a plurality of inner strings (S2 and S3, S2 to S5) positioned between the outer strings (S1 and S4, S1 and S6), each of the plurality of strings (S1 to S4, S1 to S6) including a plurality of solar cells in electrical connection and arranged in a row; protection layers disposed at the front and rear surfaces of the solar cells, a transparent member disposed on the protection layer on the front surface of the solar cells, a back sheet disposed on the protection layer on the rear surface of the solar cells, a plurality of interconnectors electrically connecting the plurality of solar cells of the strings; a junction box that is configured to receive electric current generated from the plurality of strings; and a plurality of lead wires electrically coupling the junction box to an end portion of the interconnectors, wherein the plurality of lead wires includes two outer lead wires (OLW1, OLW2) and a plurality of inner lead wires (ILW1 and ILW2, ILW1 to ILW4), characterized in that each outer lead wire (OLW1, OLW2) includes an interconnector connection part (OLW1-1, OLW2-1) connected to a corresponding interconnector (220a and 220d, 220a and 220f) of an outer string, and a coupling part (OLW1-2, OLW2-2) connecting the interconnector connection part (OLW1-1, OLW2-1) and the junction box, each inner lead wire ((ILW1 to ILW2), (ILW1 to ILW4)) includes an interconnector connection part (ILW1-1, ILW2-1) connected to a corresponding interconnector (220b to 220c, 220b to 220e) of an inner string and a junction box connection part (ILW1-2, ILW2-2) connecting the interconnector connection part (ILW1-1, ILW2-1) and the junction box; wherein the plurality of lead wires are arranged such that they do not overlap with each other, and wherein the interconnector connection parts (OLW1-1, OLW2-1) of the outer lead wires (OLW1, OLW2) do not overlap with the plurality of outer strings (S1 and S4, S1 and S6). a solar cell panel including an array of solar cells defining a plurality of outer strings (S1 and S4, S1 and S6) positioned closest to two outer edges of the solar cell panel and a plurality of inner strings (S2 and S3, S2 to S5) positioned between the outer strings (S1 and S4, S1 and S6), each of the plurality of strings (S1 to S4, S1 to S6) including a plurality of solar cells in electrical connection and arranged in a row; protection layers disposed at the front and rear surfaces of the solar cells, a transparent member disposed on the protection layer on the front surface of the solar cells, a back sheet disposed on the protection layer on the rear surface of the solar cells, a plurality of interconnectors electrically connecting the plurality of solar cells of the strings; a junction box that is configured to receive electric current generated from the plurality of strings; and a plurality of lead wires electrically coupling the junction box to an end portion of the interconnectors, wherein the plurality of lead wires includes two outer lead wires (OLW1, OLW2) and a plurality of inner lead wires (ILW1 and ILW2, ILW1 to ILW4), characterized in that each outer lead wire (OLW1, OLW2) includes an interconnector connection part (OLW1-1, OLW2-1) connected to a corresponding interconnector (220a and 220d, 220a and 220f) of an outer string, and a coupling part (OLW1-2, OLW2-2) connecting the interconnector connection part (OLW1-1, OLW2-1) and the junction box, each inner lead wire ((ILW1 to ILW2), (ILW1 to ILW4)) includes an interconnector connection part (ILW1-1, ILW2-1) connected to a corresponding interconnector (220b to 220c, 220b to 220e) of an inner string and a junction box connection part (ILW1-2, ILW2-2) connecting the interconnector connection part (ILW1-1, ILW2-1) and the junction box; wherein the plurality of lead wires are arranged such that they do not overlap with each other, and wherein the interconnector connection parts (OLW1-1, OLW2-1) of the outer lead wires (OLW1, OLW2) do not overlap with the plurality of outer strings (S1 and S4, S1 and S6).