Luminous device for an automotive vehicle comprising a luminous module, said luminous module comprising: - first means arranged to produce a cutoff-containing first beam from at least a first light source and - second means arranged to form a second beam complementary to the cutoff-containing first beam when they are activated simultaneously, the second means comprising a plurality of second light sources and at least one optical guide for forming the second complementary beam, the at least one optical guide incorporating a cutoff-defining wall provided with a reflective face placed facing the first means, said reflective face forming a shield producing at least one portion of the cutoff of the first beam; in which the second means are arranged to produce at least two selectively activatable luminous segments so as to form said second beam complementary to the cutoff-containing first beam when they are activated simultaneously, the at least one optical guide comprising members for guiding conduction of light, from which the luminous segments originate, the guiding members and said cutoff-defining wall forming an assembly of integral construction; each luminous segment of the complementary second beam being obtained via interaction of a second light source with a guiding member associated therewith so that an entrance face of said guiding member receives the light respectively emitted by said second light source, in which the reflective face lies flush with an exit edge of the guiding members, which is located on the border of the cutoff-defining wall, said exit edge extending conjointly along the cutoff-defining wall and along an exit face of the guiding members, the reflective face extending longitudinally from a front edge of the cutoff-defining wall of the at least one optical guide forming a cutoff-defining edge for the first beam rearwards, characterized in that the cutoff-defining wall is a wall of at least one optical guide specifically dedicated to the formation of the shield, and in that the cutoff-defining wall lies partially at distance (d) from at least one upper wall of the guiding members. - first means arranged to produce a cutoff-containing first beam from at least a first light source and - second means arranged to form a second beam complementary to the cutoff-containing first beam when they are activated simultaneously, the second means comprising a plurality of second light sources and at least one optical guide for forming the second complementary beam, the at least one optical guide incorporating a cutoff-defining wall provided with a reflective face placed facing the first means, said reflective face forming a shield producing at least one portion of the cutoff of the first beam; in which the second means are arranged to produce at least two selectively activatable luminous segments so as to form said second beam complementary to the cutoff-containing first beam when they are activated simultaneously, the at least one optical guide comprising members for guiding conduction of light, from which the luminous segments originate, the guiding members and said cutoff-defining wall forming an assembly of integral construction; each luminous segment of the complementary second beam being obtained via interaction of a second light source with a guiding member associated therewith so that an entrance face of said guiding member receives the light respectively emitted by said second light source, in which the reflective face lies flush with an exit edge of the guiding members, which is located on the border of the cutoff-defining wall, said exit edge extending conjointly along the cutoff-defining wall and along an exit face of the guiding members, the reflective face extending longitudinally from a front edge of the cutoff-defining wall of the at least one optical guide forming a cutoff-defining edge for the first beam rearwards, characterized in that the cutoff-defining wall is a wall of at least one optical guide specifically dedicated to the formation of the shield, and in that the cutoff-defining wall lies partially at distance (d) from at least one upper wall of the guiding members.