Abstract: The inventive dosing and distributing device consists of a support (1) with a mounting base (5) which can be adapted on the top of a receptacle (4) containing the product to be distributed; a dosing chamber (2) and calibrating means, such as a calibrated piston (3). Said support (1) comprises a cylindrical body (6) in which the dosing chamber (2) is mounted in such a way that it can rotate. The piston (3) is introduced into the dosing chambre (2), where it delimits a cavity (25) corresponding to the dose to be distributed. Said cavity is filled by turning the receptacle (4), through openings arranged so that they correspond. Once the metering chamber (2) has been rotated, the dose of the product to be distributed is delivered by a pouring spout (10) that is formed on the support (1), through other openings which are also arranged in such a way that the correspond. A dosing and distributing device of this type can be used for distributing pharmaceutical products in the form of microbeads or microgranules.