Regulating valve for a gas cooking appliance, comprising a valve body with an inlet conduit and at least one outlet conduit, and a rotating disc (20) arranged between the inlet conduit and the outlet conduit, comprising a plurality of connecting holes for regulating the gas flow, more than one connecting hole overlapping with an outlet hole (15) of the outlet conduit (12), and the rotating disc (20) comprising a main series (31 1 ,...,31 n ) of connecting holes increasing in size in the direction of increasing gas flow. There is an intercalated hole between successive holes of the main series (31 1 ,...,31 n ) and after each hole of said main series (31 1 ,...,31 n ), the size of each intercalated hole being smaller than the size of the preceding contiguous hole of the main series (31 1 ,...,31 n ).