The invention concerns a nasal cushion for a respiratory nasal mask comprising a hollow body (11) with an internal chamber (2), and a pair of nasal prongs (12) each connected by a proximal end (19), to the hollow body (11) and each comprising an internal gas passage in fluid communication with the internal chamber (2) of the hollow body (11), each of said nasal prongs (12) further having a distal end (9) comprising an outlet orifice (13) fluidly communicating with the internal gas passage. Further, the proximal end (19) of the nasal prongs (12) comprises a flexible bellow portion (10) allowing each prong (12) to pivot so as to modify its orientation with respect to the hollow body (11). The invention also concerns a respiratory nasal mask equipped with such a nasal cushion and its use for treating respiratory failures or disorders, such as sleep apnoea or the like.
