Respiratory mask comprising: - a mask body comprising an inner chamber and a gas inlet in fluid communication with said inner chamber, - a hollow curved connector comprising an upstream portion and a downstream portion separated by an elbow portion, said hollow curved connector being traversed by an inner passage comprising an inlet orifice in the upstream portion and an outlet orifice in the downstream portion, said downstream portion being fluidly connected to the mask body for feeding gas into the inner chamber, and - a front piece comprising a central aperture and headgear connecting structures, and wherein the gas inlet of the mask body and the central aperture of the front piece are traversed by the downstream portion of the hollow connector, and the peripheral outer wall of the downstream portion of the hollow connector is shaped so as to present a first abutment structure and a second abutment structure, said first and second abutment structures (15, 16) cooperating with the front piece and the mask body for holding the hollow connector and the front piece integral with the mask body, when the downstream portion of the hollow connector is inserted into the gas inlet of the mask body, characterized in that the front piece is hold tight in position as being squeezed between the first abutment structure and the mask body, and the assembly comprising the front piece, the hollow curved connector and the mask body is further hold tight together thanks to the cooperation of the second abutment structure with the inner wall of the mask body in the region located around the gas inlet inside the mask body, without requiring any positive connection of the front piece with the mask body. - a mask body comprising an inner chamber and a gas inlet in fluid communication with said inner chamber, - a hollow curved connector comprising an upstream portion and a downstream portion separated by an elbow portion, said hollow curved connector being traversed by an inner passage comprising an inlet orifice in the upstream portion and an outlet orifice in the downstream portion, said downstream portion being fluidly connected to the mask body for feeding gas into the inner chamber, and - a front piece comprising a central aperture and headgear connecting structures, and wherein the gas inlet of the mask body and the central aperture of the front piece are traversed by the downstream portion of the hollow connector, and the peripheral outer wall of the downstream portion of the hollow connector is shaped so as to present a first abutment structure and a second abutment structure, said first and second abutment structures (15, 16) cooperating with the front piece and the mask body for holding the hollow connector and the front piece integral with the mask body, when the downstream portion of the hollow connector is inserted into the gas inlet of the mask body, characterized in that the front piece is hold tight in position as being squeezed between the first abutment structure and the mask body, and the assembly comprising the front piece, the hollow curved connector and the mask body is further hold tight together thanks to the cooperation of the second abutment structure with the inner wall of the mask body in the region located around the gas inlet inside the mask body, without requiring any positive connection of the front piece with the mask body.