Ampoule cutter

The utility model relates to an ampoule cutter, which belongs to a cutting instrument suitable for medical staff when the ampoule is used. The utility model is composed of a cylinder barrel body 2, an open conical inner cavity 1, a diamond knife 3, etc. The diamond tool 3 is welded on the lower end surface of a screw bolt 4 and passes through a small hole to insert in the open conical inner cavity 1. Owing to the cutting action of the diamond tool 3, when the upper part of the ampoule is inserted in the open conical inner cavity 1 and rotated, an even and regular scratch with an ample depth at the ampoule neck is cut by the diamond tool 3, and then, the ampoule can be opened by a light prizing. The ampoule cutter has the advantages of simple structure, simple manufacture and mounting, low cost and extensive use.