A solar cell panel comprising: a plurality of solar cells each comprising a semiconductor substrate, first electrodes disposed at a front surface of the semiconductor substrate, second electrodes disposed at a back surface of the semiconductor substrate, a plurality of leads for connecting neighboring ones of the plurality of solar cells such that the first electrode in one of the neighboring solar cells is connected to the second electrode in the other of the neighboring solar cells, wherein the first electrodes comprise: a plurality of finger lines formed to extend in a first direction while being parallel, and 6 or more bus bar lines formed to extend in a second direction crossing the first direction, wherein the bus bar lines include a line section extending lengthily in a direction, and pad sections having a greater width than the line section, wherein the pad sections include first pad sections disposed at opposite ends of the line section, and second pad sections disposed in an inside region of the bus bar line, except for the first pad sections, wherein each of the leads is connected to the pad sections in a corresponding one of the bus bar lines while contacting the pad sections, wherein the first pad sections are arranged at the corresponding end of the bus bar lines where the lead is disposed, wherein each of the leads have a cross-section having a circular shape, an oval shape or a round shape, wherein an edge area is defined between one end of the bus bar line and an edge (161, 162) of the solar cell adjacent thereto or between the other end of the bus bar line and an edge (161, 162) of the solar cell adjacent thereto, wherein the edge area includes first edge areas each corresponding to a region where a respective one of the leads is disposed, while being defined between neighboring finger lines, and second edge areas corresponding to a remaining portion of the edge area except for the first edge areas, while being defined between outermost ones of the finger lines and the corresponding edge of the solar cell. a plurality of solar cells each comprising a semiconductor substrate, first electrodes disposed at a front surface of the semiconductor substrate, second electrodes disposed at a back surface of the semiconductor substrate, a plurality of leads for connecting neighboring ones of the plurality of solar cells such that the first electrode in one of the neighboring solar cells is connected to the second electrode in the other of the neighboring solar cells, wherein the first electrodes comprise: a plurality of finger lines formed to extend in a first direction while being parallel, and 6 or more bus bar lines formed to extend in a second direction crossing the first direction, wherein the bus bar lines include a line section extending lengthily in a direction, and pad sections having a greater width than the line section, wherein the pad sections include first pad sections disposed at opposite ends of the line section, and second pad sections disposed in an inside region of the bus bar line, except for the first pad sections, wherein each of the leads is connected to the pad sections in a corresponding one of the bus bar lines while contacting the pad sections, wherein the first pad sections are arranged at the corresponding end of the bus bar lines where the lead is disposed, wherein each of the leads have a cross-section having a circular shape, an oval shape or a round shape, wherein an edge area is defined between one end of the bus bar line and an edge (161, 162) of the solar cell adjacent thereto or between the other end of the bus bar line and an edge (161, 162) of the solar cell adjacent thereto, wherein the edge area includes first edge areas each corresponding to a region where a respective one of the leads is disposed, while being defined between neighboring finger lines, and second edge areas corresponding to a remaining portion of the edge area except for the first edge areas, while being defined between outermost ones of the finger lines and the corresponding edge of the solar cell. a plurality of finger lines formed to extend in a first direction while being parallel, and 6 or more bus bar lines formed to extend in a second direction crossing the first direction, wherein the bus bar lines include a line section extending lengthily in a direction, and pad sections having a greater width than the line section, wherein the pad sections include first pad sections disposed at opposite ends of the line section, and second pad sections disposed in an inside region of the bus bar line, except for the first pad sections, wherein each of the leads is connected to the pad sections in a corresponding one of the bus bar lines while contacting the pad sections, wherein the first pad sections are arranged at the corresponding end of the bus bar lines where the lead is disposed, wherein each of the leads have a cross-section having a circular shape, an oval shape or a round shape, wherein an edge area is defined between one end of the bus bar line and an edge (161, 162) of the solar cell adjacent thereto or between the other end of the bus bar line and an edge (161, 162) of the solar cell adjacent thereto, wherein the edge area includes first edge areas each corresponding to a region where a respective one of the leads is disposed, while being defined between neighboring finger lines, and second edge areas corresponding to a remaining portion of the edge area except for the first edge areas, while being defined between outermost ones of the finger lines and the corresponding edge of the solar cell.