The present invention relates to a feeding device (1) for a single-grain seed drill via a flow of air from a main reservoir (2) containing product to at least one auxiliary reservoir (4) depending on its filling rate, each auxiliary reservoir (4) being connected to said main reservoir (2) by a respective leaktight duct (5), the number of auxiliary reservoirs (4) corresponding to the number of dispensers (3) of said single-grain seed drill. The feeding device is noteworthy in that a regulating system (16) is connected to each auxiliary reservoir (4) and in that said regulating system (16) has a sensor (17) for detecting the level of product and a valve (18) for regulating the flow of air in said corresponding auxiliary reservoir (4). The present invention also relates to a single-grain seed drill using a feeding device according to the invention.
