The utility model discloses a portable vacuum cleaner solves the unclean or inconvenient problem of clearance of the disastrous and tiny rubbish of the energy consumption clearance of using current dust catcher tiny rubbish of clearance or narrow corner to exist, this dust catcher is including covering the body, fan and filter screen, and the filter screen setting is internal at the cover at least, be equipped with cover mouthful A and cover mouthful B on the cover body, cover mouthful A's diameter is less than cover mouthful B's diameter, the fan sets up in cover mouthful B side, and the side orientation cover mouthful A that induced drafts of fan, and the fan setting contains in the structure of cover mouthful B side: the fan sets up between filter screen and cover mouthful B, or the cover mouth B side of the cover body is equipped with the extension frame, the fan sets up on this extension frame, adopting the dust catcher in this application, can clearing up tiny rubbish or clear up in narrow corner, the disastrous and tiny rubbish of energy consumption of avoiding using current dust catcher tiny rubbish of clearance or narrow corner to exist be cleared up totally or the inconvenient problem of clearance.