A respiratory mask comprising a shell (1) defining an internal chamber and connection means (2a, 2b, 6a, 6b) for fixing a headgear (8, 13, 14), said connection means (2a, 2b, 6a, 6b) being integral with the shell (1) and said shell (1) comprising a plan (P) of symmetry, characterized in that said connection means (2a, 2b, 6a, 6b) comprise two headgear-fixing hooks (2a, 2b) arranged on opposite sides of the shell (1) and each being fixed to the shell (1) by means of a corresponding linking portion (6a, 6b), each headgear-fixing hook (2a, 2b)comprising a flat surface (12a, 12b) facing the shell (1), each flat surface (12a, 12b) having a corresponding axis (AA, BB), wherein the axis (AA, BB) of each flat surface (12a, 12b) forms with the symmetry plan (P) of the shell (1) an angle (±) of between 5 and 50°.
