A cyclonic portable vacuum cleaner comprises a main body (10), an air circuit comprising a suction air intake (21) and an air outlet (22), a cyclonic chamber (30) integral with the main body (10) andarranged to separate impurities from an air flow through the air circuit, wherein the main body (10) and a cyclone enclosure (30) each have a base; the base of the main body (10) comprises a main lower surface (19) and a support means forming a support plane of the vacuum cleaner resting on a plane support (100); the base of the cyclonic enclosure (30) is offset from the support plane, so that only the support means of the base of the main body (10) rests on the plane support (100). The support means comprises two longitudinal side ribs (16a, 16b) which are arranged on respective sides of themain lower surface (19) of the base of the main body (10).