A respiratory mask comprising a main body (1) comprising a first connecting structure (2) and a flexible cushion (11) comprising a second connecting structure (12) cooperating with the first connecting structure for connecting and maintaining the cushion integral with the main body. The cushion comprises at least one lodging (13), and the main body comprises at least one protruding element (3) that is at least partially inserted into said lodging when the cushion is correctly coupled to the main body. The main body comprises at least a first marking (4) located on its peripheral surface (1), and the cushion (11) comprises at least a second marking (14) located on its peripheral surface (11), the first and second markings being aligned when the cushion is correctly coupled to the main body. The respiratory mask is useable for treatment of respiratory disorders affecting child or adult patients, such as obstructive sleep apnea.
