Respiratory mask comprising: - a main body comprising:. a holding arm projecting upwardly from said main body and two lateral arms (4, 5) projecting laterally from said main body, said two lateral arms (4, 5) and holding arm being integrally fixed to said main body, and. a tubular-shape portion traversed by a central passage, - and a flexible cushion comprising a tubular structure (11a, 11b, 11c) traversed by a gas passage, said tubular structure (11a, 11b, 11c) cooperating with the tubular-shape portion of the main body so as to maintain the flexible cushion coupled to the tubular-shape portion of the main body, wherein the tubular structure (11a, 11b, 11c) comprises a first and a second annular coupling wall (11a, 11b) arranged face-to-face around said gas passage and an annular spacing separating said first and a second annular coupling wall (11a, 11b), the tubular-shape portion of the main body being at least partially inserted into the annular spacing of the flexible cushion and squeezed between the first and second annular coupling walls (11a, 11b) of the flexible cushion so as to maintain the flexible cushion firmly coupled to the tubular-shape portion of the main body, characterized in that: - the main body comprises at least one lodging, said lodging comprising an opening traversing the proximal end of the holding arm, - the flexible cushion comprises at least one protruding element projecting away from the external surface of the cushion, said protruding element being at least partially inserted into the opening of the lodging of the main body when the flexible cushion is coupled to the main body, said protruding element having an outer peripheral profile that matches the inner profile of the opening of the lodging, - the flexible cushion and protruding element are made of a soft flexible material. - a main body comprising:. a holding arm projecting upwardly from said main body and two lateral arms (4, 5) projecting laterally from said main body, said two lateral arms (4, 5) and holding arm being integrally fixed to said main body, and. a tubular-shape portion traversed by a central passage,. a holding arm projecting upwardly from said main body and two lateral arms (4, 5) projecting laterally from said main body, said two lateral arms (4, 5) and holding arm being integrally fixed to said main body, and. a tubular-shape portion traversed by a central passage, - and a flexible cushion comprising a tubular structure (11a, 11b, 11c) traversed by a gas passage, said tubular structure (11a, 11b, 11c) cooperating with the tubular-shape portion of the main body so as to maintain the flexible cushion coupled to the tubular-shape portion of the main body, wherein the tubular structure (11a, 11b, 11c) comprises a first and a second annular coupling wall (11a, 11b) arranged face-to-face around said gas passage and an annular spacing separating said first and a second annular coupling wall (11a, 11b), the tubular-shape portion of the main body being at least partially inserted into the annular spacing of the flexible cushion and squeezed between the first and second annular coupling walls (11a, 11b) of the flexible cushion so as to maintain the flexible cushion firmly coupled to the tubular-shape portion of the main body, - the main body comprises at least one lodging, said lodging comprising an opening traversing the proximal end of the holding arm, - the flexible cushion comprises at least one protruding element projecting away from the external surface of the cushion, said protruding element being at least partially inserted into the opening of the lodging of the main body when the flexible cushion is coupled to the main body, said protruding element having an outer peripheral profile that matches the inner profile of the opening of the lodging, - the flexible cushion and protruding element are made of a soft flexible material.