A photovoltaic module comprising: a solar cell module including a plurality of solar cells, a front substrate, a rear substrate, a first sealing member disposed between the rear substrate and the plurality of solar cells, and a second sealing member disposed between the front substrate and the plurality of solar cells; a junction box including a plurality of bypass diodes (Da, Db, Dc), a dc/dc converter unit configured to convert the level of DC power supplied from the solar cell module, and inverter unit configured to convert the level-converted DC power into AC power, the junction box disposed on the rear surface of the solar cell module; a plate disposed between the solar cell module and the junction box, wherein an end portion of the plate and a contact surface of the solar cell module are attached by an adhesive member, and the plate is disposed on the rear substrate of the solar cell module; and coupling members (350a, 350b, 350c, 350d) configured to attach and detach the junction box to and from the solar cell module, wherein the coupling members (350a, 350b, 350c, 350d) penetrate openings formed in the junction box and are coupled to coupling grooves formed on the plate, wherein the solar cell module further includes a plurality of solar cell strings (140a, 140b, 140c, 140d, 140e, 140f) formed with some of the plurality of solar cells connected in a row, and a plurality of conductive lines (135a, 135b, 135c, 135d) configured to electrically connect the plurality of solar cell strings and the plurality of bypass diodes (Da, Db, Dc) within the junction box, wherein the plurality of conductive lines (135a, 135b, 135c, 135d) are extended to a rear surface of the solar cell module through corresponding openings formed in the solar cell module, and wherein the plate is made of metal materials, and a cross-sectional area of the plate is larger than that of the junction box. a solar cell module including a plurality of solar cells, a front substrate, a rear substrate, a first sealing member disposed between the rear substrate and the plurality of solar cells, and a second sealing member disposed between the front substrate and the plurality of solar cells; a junction box including a plurality of bypass diodes (Da, Db, Dc), a dc/dc converter unit configured to convert the level of DC power supplied from the solar cell module, and inverter unit configured to convert the level-converted DC power into AC power, the junction box disposed on the rear surface of the solar cell module; a plate disposed between the solar cell module and the junction box, wherein an end portion of the plate and a contact surface of the solar cell module are attached by an adhesive member, and the plate is disposed on the rear substrate of the solar cell module; and coupling members (350a, 350b, 350c, 350d) configured to attach and detach the junction box to and from the solar cell module, wherein the coupling members (350a, 350b, 350c, 350d) penetrate openings formed in the junction box and are coupled to coupling grooves formed on the plate, wherein the solar cell module further includes a plurality of solar cell strings (140a, 140b, 140c, 140d, 140e, 140f) formed with some of the plurality of solar cells connected in a row, and a plurality of conductive lines (135a, 135b, 135c, 135d) configured to electrically connect the plurality of solar cell strings and the plurality of bypass diodes (Da, Db, Dc) within the junction box, wherein the plurality of conductive lines (135a, 135b, 135c, 135d) are extended to a rear surface of the solar cell module through corresponding openings formed in the solar cell module, and wherein the plate is made of metal materials, and a cross-sectional area of the plate is larger than that of the junction box.