Vacuum cleaner

A vacuum cleaner comprises a suction generator to generate an airflow, a dirt separator 300 comprising an opening 302 to permit the airflow to pass into the dirt separator, a filter assembly 306 to separate dirt from the airflow, and a dirt collection chamber 308 to collect dirt separated from the airflow, and an attachment 220 attached to the dirt separator. The attachment comprises a housing comprising a duct 221 to deliver the airflow to the opening of the dirt separator, and a compaction member 226 movable between a first position in which all of the compaction member is upstream of the opening, and a second position in which the compaction member extends through the opening of the dirt separator and into the dirt collection chamber to compact dirt collected in the dirt collection chamber (figure 11).