A solar cell comprising: a semiconductor substrate; a conductive region disposed in or on the semiconductor substrate; and an electrode comprising a plurality of finger lines connected to the conductive region, and 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, each of the bus bar lines having a width of 35 to 350μm at at least a portion thereof, wherein the each of the bus bar lines has a distance between opposite ends thereof in the second direction smaller than a distance between outermost ones of the finger lines respectively disposed at opposite sides of the semiconductor substrate in the second direction, wherein each of the bus bar lines comprises a plurality of pad sections arranged to be spaced apart from one another in the second direction, wherein the plurality of pad sections comprises: first pad sections having a length in the second direction greater than a width of the plurality of finger lines, wherein the first pad sections are disposed at opposite ends of the bus bar lines in the second direction, and second pad sections having a length in the second direction greater than the width of the plurality of finger lines, wherein the second pad sections are disposed in an inside region of the bus bar line, wherein an edge area is defined between one end of the one of the bus bar lines and an edge of the solar cell adjacent thereto or between the other end of the one of the bus bar lines and an edge of the solar cell adjacent thereto, wherein the edge area includes first edge areas defined between neighboring finger lines, 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 edge of the solar cell adjacent thereto, wherein a lead is disposed in the first edge areas. a semiconductor substrate; a conductive region disposed in or on the semiconductor substrate; and an electrode comprising a plurality of finger lines connected to the conductive region, and 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, each of the bus bar lines having a width of 35 to 350μm at at least a portion thereof, wherein the each of the bus bar lines has a distance between opposite ends thereof in the second direction smaller than a distance between outermost ones of the finger lines respectively disposed at opposite sides of the semiconductor substrate in the second direction, wherein each of the bus bar lines comprises a plurality of pad sections arranged to be spaced apart from one another in the second direction, wherein the plurality of pad sections comprises: first pad sections having a length in the second direction greater than a width of the plurality of finger lines, wherein the first pad sections are disposed at opposite ends of the bus bar lines in the second direction, and second pad sections having a length in the second direction greater than the width of the plurality of finger lines, wherein the second pad sections are disposed in an inside region of the bus bar line, first pad sections having a length in the second direction greater than a width of the plurality of finger lines, wherein the first pad sections are disposed at opposite ends of the bus bar lines in the second direction, and second pad sections having a length in the second direction greater than the width of the plurality of finger lines, wherein the second pad sections are disposed in an inside region of the bus bar line, wherein an edge area is defined between one end of the one of the bus bar lines and an edge of the solar cell adjacent thereto or between the other end of the one of the bus bar lines and an edge of the solar cell adjacent thereto, wherein the edge area includes first edge areas defined between neighboring finger lines, 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 edge of the solar cell adjacent thereto, wherein a lead is disposed in the first edge areas.