According to the invention, the irrigation device (1) comprises: a receptacle (10) which is suitable for containing a liquid and which has a body (11) and an opening (13)； a nozzle (20, 200) with a base (21), which is designed to be fixed on said receptacle (10), and with a tip (22), which has an orifice (23) intended to allow the liquid to flow out of the device (1)； a means for controlling the flow rate of said liquid capable of flowing through said flow orifice (23), characterized in that said means for controlling the flow rate of liquid comprises a second orifice (24), connected to the flow orifice (23) by a conduit (25), and a third orifice (36), connected to the receptacle (10), and means are provided for varying the relative positions of said second and third orifices (24, 36), such that the cross section of passage of liquid passing through the second and third orifices (24, 36) can vary.
