A device for collecting soiled objects, such as used diapers, comprising a collecting container (1) closable by a cover (2) having a cover section (6) with a tubular chamber (7) open at one end providing an inlet/outlet opening (8), said cover section (6) being movable between a first position, in which an object may be deposited from the outside through said opening (8) into said chamber (7), and a second position, in which said object may drop through said opening (8) into the collecting container (1) and a transfer bag (12) of a flexible material removably mounted within said chamber (7), said bag (12) being open at one end and having a bottom cooperating with an expel body (11d) at the opposite end, wherein the collar (12b) of the transfer bag (12) is attached to said opening (8) by a locking ring (13).