A device (1) for improving nasal ventilation is provided for, comprising first means (2) suitable to collect a flow of air emitted from a nostril and including a sealing element (4) suitable to be inserted in conditions of adherence into a nostril and having internally a through cavity (7), and at least one cannula (5) having an inner duct (8) extending between said through cavity (7) and an operating end (9) open and distanced from said sealing element (4),and comprising second means (3) consecutive to the operating end (9) and suitable to highlight the flow of air emerging from the operating end (9).
