a hand - held cutter with automatic blade changer which has a casing , short blades each with an aperture , a pushbutton and a plug , and the casing is composed of an outer casing , a fixed blade holder and a retractable blade holder ; and it further has a blade changer which is divided into a blade unloading chamber and a blade loading chamber . the present invention has the advantages of being simple in construction and convenient to use , and allowing the users to change and dispose of the blades without touching them , thereby effectively protecting personal safety .