Plasma generation equipment having a plasma gun which can remove droplets mixed with plasma efficiently without reducing the effective amount of plasma generated by vacuum arc discharge and in which a droplet removing section can be constituted easily and inexpensively, and precision of surface treatment of films by high purity plasma can be enhanced. Periphery of the cathode (407) of a plasma gun is surrounded by an enclosure member (420) and a droplet remover (406) constituted by laying a plurality of droplet catching members (411) in multilayer is provided on the inside of the enclosure member (420). The enclosure member (420), the catching member (411) and a plasma traveling path (402) have no relation of connection with an arc power supply (409) and held in electrically neutral floating state.