Filling device for a machine for filling comprising - a filling spout formed by a tubular body having an internal passage (10'a) with longitudinal axis (A'), an open lower axial end constituting the outlet orifice, and a feed orifice, - a feed duct in order to supply said filling spout with filling product, connected by a first end to the feed orifice, - dosing means comprising: -- a blocking system comprising a valve able to be mounted mobile in said tubular body, and -- a first actuating system able to longitudinally move said valve between a closed position in order to close the outlet orifice and at least one open position, -- a flow regulation system mounted on the feed duct, said flow regulation system comprises: - a flow-regulating rod, mounted in a sliding manner, in a substantially sealed manner, in a hole of said feed duct, and - a second actuating system able to move the flow-regulating rod, between a retracted position, referred to as high flow-rate, wherein said rod is arranged substantially outside the internal feed passage of the feed duct, and a deployed position, referred to as low flow-rate, wherein said rod extends into said internal passage in order to reduce the circular transverse passage section of the feed duct, characterised in that said feed duct comprises - an intermediate portion defining an intermediate central passage, - an upstream portion (7'a) defining an upstream passage (70'a) - and a downstream portion (7'b) defining a downstream passage (70'b), the flow-regulating rod being mounted in a sliding manner in an axial hole formed at an axial end of the intermediate portion of the feed duct, said second actuating system being able to move the flow-regulating rod axially in the intermediate central passage, in that the central passage comprises from its axial end provided with said axial hole, a first portion, of which the transverse section is greater than the transverse section of the flow-regulating rod, an intermediate portion and a second portion, said second portion having a section less than that of the first portion, the flow-regulating rod in its low flow-rate position extending into said intermediate portion and into the second portion, and in that the internal surface of the intermediate portion, which defines said intermediate central passage, is provided with a longitudinal recess extending along the intermediate portion and the second portion, said recess defining a secondary lateral passage for the flow of the filling product in low flow-rate position. - a filling spout formed by a tubular body having an internal passage (10'a) with longitudinal axis (A'), an open lower axial end constituting the outlet orifice, and a feed orifice, - a feed duct in order to supply said filling spout with filling product, connected by a first end to the feed orifice, - dosing means comprising: -- a blocking system comprising a valve able to be mounted mobile in said tubular body, and -- a first actuating system able to longitudinally move said valve between a closed position in order to close the outlet orifice and at least one open position, -- a flow regulation system mounted on the feed duct, -- a blocking system comprising a valve able to be mounted mobile in said tubular body, and -- a first actuating system able to longitudinally move said valve between a closed position in order to close the outlet orifice and at least one open position, -- a flow regulation system mounted on the feed duct, - a flow-regulating rod, mounted in a sliding manner, in a substantially sealed manner, in a hole of said feed duct, and - a second actuating system able to move the flow-regulating rod, between a retracted position, referred to as high flow-rate, wherein said rod is arranged substantially outside the internal feed passage of the feed duct, and a deployed position, referred to as low flow-rate, wherein said rod extends into said internal passage in order to reduce the circular transverse passage section of the feed duct, - an intermediate portion defining an intermediate central passage, - an upstream portion (7'a) defining an upstream passage (70'a) - and a downstream portion (7'b) defining a downstream passage (70'b),