Irrigation device for the sinus-sinus cavities (1) comprising a container (10), a tubular element (20, 200) comprising a base (21) intended to be fixed on said container (10) and an upper part (22) having a hole (23) intended to allow the circulation of the liquid out of the device (1), and a means of regulating the flow rate of said liquid capable of flowing through said circulation hole (23), characterized in that: - the container (10) comprises a body (11) in the flexible walls (111), a flat bottom and an opening (13) provided in a neck (12), - the tubular element (20) is crossed by a conduit (25, 250) having at each of its ends a hole (23, 24), of which a first hole (23) is the hole intended to allow the circulation of the liquid out of the device (1), and a second hole (24) having an elongated section, - an intermediate piece ( 30) apt to be in solidarity with the indicated container (10) is arranged between the container (10) and the tubular element (30), fixed on the neck (12), and crossed by a conduit (38) that flows into a third hole (36) having an elongated section, the second hole (24) and the third hole (36) being aligned on the same axis (Ax) when the tubular element (20) is mounted on the indicated intermediate piece (30), - the means for regulating the flow rate of said liquid capable of flowing through said circulation orifice (23) is composed of means provided to rotate the said tubular element (20) in rotation and modify the relative positions of the indicated second and third holes (24, 36) so that the liquid passage section through the second and third holes (24, 36) can vary around the axis (Ax), the section of the third hole (36) is narrower than the second hole section or (24).Dispositivo de irrigación de las cavidades naso-sinusianas (1) que comprende un recipiente (10), un elemento tubular (20, 200) que comprende una base (21) prevista para ser fijada sobre el indicado recipiente (10) y una parte superior (22) que presenta un orificio (23) d
