An autonomous vacuum cleaner comprising a main body defining a first axis and housing a dirty air inlet, a clean air outlet, an airflow path between the dirty air inlet and the clean air outlet and a separating apparatus arranged in the air flow path between the dirty air inlet and the clean air outlet, the separating apparatus defining a second axis, wherein the separating apparatus is oriented so that the second axis is substantially parallel with the first axis of the main body and wherein a portion of the separating apparatus protrudes from a forward portion of the main body of the vacuum cleaner.