A fluid spray head comprising: • a body forming a connection sleeve that is adapted to receive a valve rod of a dispenser member, such as a pump or a valve, the connection sleeve being connected via a feed duct , to a housing in which there extends a core that defines a core side wall and a core front wall , • a nozzle (2; 2') engaged in the housing around the core , the nozzle (2; 2') forming a spray orifice (O) through which the fluid leaves the spray head in the form of a spray, the spray orifice (O) presenting a chamber outlet diameter D3 and a chamber outlet section S3, • the core and the nozzle (2; 2') defining between them, from upstream to downstream: • a plurality of connection passages (P) in fluid communication with the feed duct , • a plurality of swirl channels (T) respectively connected to the connection passages (P), each swirl channel (T) presenting a channel length L1, a channel inlet (T0) having a channel inlet section SO and a channel outlet (T1) having a channel outlet section S1, • a swirl chamber (C) into which the swirl channels (T) open out, the swirl chamber (C) defining a longitudinal axis of revolution X and presenting an axial length L2, a chamber inlet diameter D2 and a chamber inlet section S2 where the swirl channels (T) open out, the spray orifice (O) forming an outlet for the swirl chamber (C), the spray head being characterized in that L1 ≥ 110% of D2, and preferably L1 is equal to approximately 150% of D2. • a body forming a connection sleeve that is adapted to receive a valve rod of a dispenser member, such as a pump or a valve, the connection sleeve being connected via a feed duct , to a housing in which there extends a core that defines a core side wall and a core front wall , • a nozzle (2; 2') engaged in the housing around the core , the nozzle (2; 2') forming a spray orifice (O) through which the fluid leaves the spray head in the form of a spray, the spray orifice (O) presenting a chamber outlet diameter D3 and a chamber outlet section S3, • the core and the nozzle (2; 2') defining between them, from upstream to downstream: • a plurality of connection passages (P) in fluid communication with the feed duct , • a plurality of swirl channels (T) respectively connected to the connection passages (P), each swirl channel (T) presenting a channel length L1, a channel inlet (T0) having a channel inlet section SO and a channel outlet (T1) having a channel outlet section S1, • a swirl chamber (C) into which the swirl channels (T) open out, the swirl chamber (C) defining a longitudinal axis of revolution X and presenting an axial length L2, a chamber inlet diameter D2 and a chamber inlet section S2 where the swirl channels (T) open out, the spray orifice (O) forming an outlet for the swirl chamber (C), • a plurality of connection passages (P) in fluid communication with the feed duct , • a plurality of swirl channels (T) respectively connected to the connection passages (P), each swirl channel (T) presenting a channel length L1, a channel inlet (T0) having a channel inlet section SO and a channel outlet (T1) having a channel outlet section S1, • a swirl chamber (C) into which the swirl channels (T) open out, the swirl chamber (C) defining a longitudinal axis of revolution X and presenting an axial length L2, a chamber inlet diameter D2 and a chamber inlet section S2 where the swirl channels (T) open out, the spray orifice (O) forming an outlet for the swirl chamber (C), <EOS>