Photovoltaic module comprising: - a first transparent layer forming the front face of the photovoltaic module, that will receive a light flux, - a plurality of photovoltaic cells arranged side by side and electrically connected together, - an assembly encapsulating the plurality of photovoltaic cells, - a second layer forming the rear face of the photovoltaic module, the second layer comprising an inner surface in contact with the encapsulating assembly, and an outer surface opposite the inner surface, the encapsulating assembly and the plurality of photovoltaic cells being located between the first layer and the second layer, the first layer being made of glass and/or at least one polymer material and its thickness is less than or equal to 1.1 mm, the inner surface of the second layer being approximately plane, the second layer also comprising raised portions above the outer surface of the second layer, the outer surface and the raised portions together defining the visible outer rear surface of the photovoltaic module, the relief of the outer surface of the second layer being in the form of elongated ribs, characterised in that at least part of the elongated ribs is located on the periphery (Pi) of the outer surface of the second layer so as to form at least a partial peripheral frame of the outer surface of the second layer, this peripheral frame being partial so as to leave a space without any elongated ribs for integration of a junction box, to contain the wiring necessary for use of the photovoltaic module, and in that at least one first elongated rib (9a1, 9a3) extends from a first corner of the periphery (Pi) of the outer surface of the second layer and at least one second elongated rib (9a2, 9a4) extends from a second corner of the periphery (Pi) of the outer surface of the second layer, the first corner and the second corner being successive corners around the periphery (Pi) of the outer surface of the second layer, said at least one first elongated rib (9a1, 9a3) and a second elongated rib (9a2, 9a4) extending towards each other so as to intersect at least at one intersection point (P1, P2, P3). - a first transparent layer forming the front face of the photovoltaic module, that will receive a light flux, - a plurality of photovoltaic cells arranged side by side and electrically connected together, - an assembly encapsulating the plurality of photovoltaic cells, - a second layer forming the rear face of the photovoltaic module, the second layer comprising an inner surface in contact with the encapsulating assembly, and an outer surface opposite the inner surface, the encapsulating assembly and the plurality of photovoltaic cells being located between the first layer and the second layer, the first layer being made of glass and/or at least one polymer material and its thickness is less than or equal to 1.1 mm, the inner surface of the second layer being approximately plane, the second layer also comprising raised portions above the outer surface of the second layer, the outer surface and the raised portions together defining the visible outer rear surface of the photovoltaic module, the relief of the outer surface of the second layer being in the form of elongated ribs, characterised in that at least part of the elongated ribs is located on the periphery (Pi) of the outer surface of the second layer so as to form at least a partial peripheral frame of the outer surface of the second layer, this peripheral frame being partial so as to leave a space without any elongated ribs for integration of a junction box, to contain the wiring necessary for use of the photovoltaic module, and in that at least one first elongated rib (9a1, 9a3) extends from a first corner of the periphery (Pi) of the outer surface of the second layer and at least one second elongated rib (9a2, 9a4) extends from a second corner of the periphery (Pi) of the outer surface of the second layer, the first corner and the second corner being successive corners around the periphery (Pi) of the outer surface of the second layer, said at least one first elongated rib (9a1, 9a3) and a second elongated rib (9a2, 9a4) extending towards each other so as to intersect at least at one intersection point (P1, P2, P3).