An illuminated signaling glazing unit for a vehicle, characterized in that it comprises - a first transparent sheet made of mineral glass, with a first main face intended to be directed toward the outside of the vehicle, a second main face intended to be directed toward the inside of the vehicle, and an edge face, - a second transparent sheet made of mineral glass, with a first main face intended to be directed toward the outside of the vehicle, and a second main face intended to be directed toward the inside of the vehicle, said second sheet being fixed to the first sheet by means of a transparent interlayer in adhesive contact - either with the second main face of the first sheet and the first main face of the second sheet, - or with the first main face of the first sheet and the second main face of the second sheet; one or more light sources, preferably light-emitting diodes, each having a light-emission face opposite the edge face, the light emitted by the light sources thus being guided into the first sheet between the first and the second main face of the latter, and - a means for extraction of the light in at least one region of the first main face or of the second main face of the first sheet or within the thickness of the first sheet, - an opaque layer formed from ink or from enamel, said opaque layer being situated toward the inside of the vehicle with respect to the extraction means and totally masking the means for extraction of the light in such a manner as to render it invisible from the inside of the vehicle, and covering a region which represents at the most 80 % of the total surface area of the glazing unit. - a first transparent sheet made of mineral glass, with a first main face intended to be directed toward the outside of the vehicle, a second main face intended to be directed toward the inside of the vehicle, and an edge face, - a second transparent sheet made of mineral glass, with a first main face intended to be directed toward the outside of the vehicle, and a second main face intended to be directed toward the inside of the vehicle, said second sheet being fixed to the first sheet by means of a transparent interlayer in adhesive contact - either with the second main face of the first sheet and the first main face of the second sheet, - or with the first main face of the first sheet and the second main face of the second sheet; one or more light sources, preferably light-emitting diodes, each having a light-emission face opposite the edge face, the light emitted by the light sources thus being guided into the first sheet between the first and the second main face of the latter, and - a means for extraction of the light in at least one region of the first main face or of the second main face of the first sheet or within the thickness of the first sheet, - an opaque layer formed from ink or from enamel, said opaque layer being situated toward the inside of the vehicle with respect to the extraction means and totally masking the means for extraction of the light in such a manner as to render it invisible from the inside of the vehicle, and covering a region which represents at the most 80 % of the total surface area of the glazing unit.