Flow component particularly for haemodialysis medical lines comprising a duct (2) having a first and a second end tubular connector (3, 4) coaxial to each other and designed to be connected to the line, and an intermediate tubular connector (8) of the female luer type arranged orthogonally to the duct (2). A hollow elastic element (9) substantially extends along the entire intermediate tubular connector (8) and the body (1) is internally configured so that, in use, the flow along the duct (2) is partly diverted towards the intermediate tubular connector (8) and introduced with a swirling motion along the cavity (12) of the hollow elastic element (9).