Waste collecting device comprising a base (10), and an intermediate body (2) comprising a disk (30) for carrying three bags, having three openings for the passage of the waste into said bags, and a first cylinder or rod (34) arranged to slide along a second cylinder or rod (35) mounted on the base (10) so as to set the height of the intermediate body, a cover (3) made of an upper and a lower element (50,70), and of circular shape and pivotable around a horizontal axis, both upper and lower elements comprising a half jaw cooperating together for crushing and reducing the volume of certain waste items, said upper element (70) having at least one opening for the passage of glass bottles and said lower element (50) of said cover comprising a set of openings (51, 52, 53, 54, 55) arranged for the passage of waste items into a determined number of compartments or recipients and in said three bags. - said