The invention relates to a jet regulator (1) having a jet regulator housing (2) which can be mounted or mounted on a sanitary water outlet and in which a jet separator (3) is provided, which has flow holes (4) through which the water flowing through the jet regulator housing (2) split into individual beams, as well as with arranged in the outflow insert parts (5, 6, 7, 8) the (5, 6, 7 8) each have a grid or network structure (9) from each other at crossing nodes (11) crossing webs (12, 13), which webs (12, 13) between them flow-through openings (14). It is characteristic of the jet regulator (1) according to the invention that the clear hole cross section of the flow holes (4) provided in the jet splitter (3) is greater in comparison to the clear opening cross section of the throughflow openings (14) of at least one of the insertion parts (5, 6, 7, 8).