A container for collecting rubbish in a differentiated manner comprises a first and a second holding chamber (5a,5b) separated by a dividing baffle (6) presenting a fixed upper portion (9) and a lower portion (10) able to oscillate around a horizontal axis to modify the volume ratio between the first and the second containment chamber (5a,5b). A cradle element (14) associated to a base wall (2) of the container (1) or extensible connecting organs associated to the movable wall (10) guarantee that the lower edge (10b) of the movable wall (10) is constantly maintained essentially in contact on the base wall (2) to prevent mixing of the waste contained respectively in one and in the other chamber (5a,5b).