A luminous module of a motor vehicle comprising a first series of at least one illuminating unit associated with a projecting optical system that is configured to produce a first exit beam from light output from the first series, the first beam forming a motor-vehicle lighting function, the luminous module comprising a second series of at least one illuminating unit associated with the projecting system, the projecting system being configured to produce a second exit beam from light output from the second series, the second beam forming a motor-vehicle signaling function, characterized in that the first and second series comprise exit dioptric interfaces located in the same focal plane of the projecting system, and wherein the second series comprises at least one light source and one optical element configured to transmit light from the at least one light source to the projecting system, the optical element comprising a plurality of waveguides (17, 18) and an optical coupler configured to distribute the light output from the at least one light source to the plurality of waveguides (17, 18) and wherein the first series comprises a plurality of light sources and a plurality of lenses each associated with a different one of said light sources and each configured to transmit the light of the associated light source to the projecting system, the plurality of lenses being formed on a first waveguide of the plurality of waveguides (17, 18), and wherein the first waveguide comprises, for each lens, an entrance dioptric interface for light output from the associated light source, and separating notches each located between two adjacent entrance dioptric interfaces 161, and wherein the notches are configured to form a surface for reflecting light rays output from the light source of the second series, the exit dioptric interfaces of the first and second series being formed by the exit surface of the waveguides (17, 18), and the exit surface of the first waveguide being formed at least partially by the exit surface of the lenses. the luminous module comprising a second series of at least one illuminating unit associated with the projecting system, the projecting system being configured to produce a second exit beam from light output from the second series, the second beam forming a motor-vehicle signaling function, characterized in that the first and second series comprise exit dioptric interfaces located in the same focal plane of the projecting system, and wherein the second series comprises at least one light source and one optical element configured to transmit light from the at least one light source to the projecting system, the optical element comprising a plurality of waveguides (17, 18) and an optical coupler configured to distribute the light output from the at least one light source to the plurality of waveguides (17, 18) and wherein the first series comprises a plurality of light sources and a plurality of lenses each associated with a different one of said light sources and each configured to transmit the light of the associated light source to the projecting system, the plurality of lenses being formed on a first waveguide of the plurality of waveguides (17, 18), and wherein the first waveguide comprises, for each lens, an entrance dioptric interface for light output from the associated light source, and separating notches each located between two adjacent entrance dioptric interfaces 161, and wherein the notches are configured to form a surface for reflecting light rays output from the light source of the second series, the exit dioptric interfaces of the first and second series being formed by the exit surface of the waveguides (17, 18), and the exit surface of the first waveguide being formed at least partially by the exit surface of the lenses.