A solar cell panel comprising: a front glass substrate (10, 10'); a back sheet positioned opposite the front substrate (10, 10'); a plurality of solar cells (100, C1, C2) positioned between the front substrate (10, 10') and the back sheet and connected to one another by a plurality of conductive lines (200, 210, 220) electrically connecting two adjacent solar cells (C1, C2) of the plurality of solar cells (100, C1, C2) which forms a string of solar cells extending in a first direction; an encapsulant (20, 30) covering the plurality of solar cells (100, C1, C2); and at least one blocking portion (400, 400') blocking the plurality of conductive lines (200, 210, 220) that is otherwise visible between the solar cells (C1, C2) from being visually seen, wherein the at least one blocking portion (400, 400') is formed on the back surface of the front substrate (10, 10') facing the back sheet, wherein the at least one blocking portion (400, 400') is made of an opaque ceramic resin, wherein the at least one blocking portion (400, 400') has substantially the same color as the back sheet, wherein each of the plurality of solar cells (100, C1, C2) is formed using a pseudo-square shaped semiconductor substrate, of which at least an edge has an inclined chamfer, wherein the at least one blocking portion (400, 400') has a line shape extending in a second direction crossing the first direction, the line shape of the at least one blocking portion (400, 400') extending from one end to the other end of the front substrate (10, 10') without interruption and entirely covering spacings between the plurality of solar cells (100, C1, C2) positioned on the same line in the first direction, and wherein the blocking portion (400, 400') includes a first portion having a predetermined width (w) along the first direction and a second portion having a varying width along the first direction, so that the second portion is configured to cover a space exposed by said at least one chamfer. a front glass substrate (10, 10'); a back sheet positioned opposite the front substrate (10, 10'); a plurality of solar cells (100, C1, C2) positioned between the front substrate (10, 10') and the back sheet and connected to one another by a plurality of conductive lines (200, 210, 220) electrically connecting two adjacent solar cells (C1, C2) of the plurality of solar cells (100, C1, C2) which forms a string of solar cells extending in a first direction; an encapsulant (20, 30) covering the plurality of solar cells (100, C1, C2); and at least one blocking portion (400, 400') blocking the plurality of conductive lines (200, 210, 220) that is otherwise visible between the solar cells (C1, C2) from being visually seen, wherein the at least one blocking portion (400, 400') is formed on the back surface of the front substrate (10, 10') facing the back sheet, wherein the at least one blocking portion (400, 400') is made of an opaque ceramic resin, wherein the at least one blocking portion (400, 400') has substantially the same color as the back sheet, wherein each of the plurality of solar cells (100, C1, C2) is formed using a pseudo-square shaped semiconductor substrate, of which at least an edge has an inclined chamfer, wherein the at least one blocking portion (400, 400') has a line shape extending in a second direction crossing the first direction, the line shape of the at least one blocking portion (400, 400') extending from one end to the other end of the front substrate (10, 10') without interruption and entirely covering spacings between the plurality of solar cells (100, C1, C2) positioned on the same line in the first direction, and wherein the blocking portion (400, 400') includes a first portion having a predetermined width (w) along the first direction and a second portion having a varying width along the first direction, so that the second portion is configured to cover a space exposed by said at least one chamfer.