PURPOSE: To simplify the configuration of a device and allow fusion spray even though the fusion spray material is not in powder form by applying an attachment to a nozzle part which sprays the material melted by the heat of plasma.

CONSTITUTION: A fusion spray material 30 of a sleeve form is secured to a mounting metal piece 31, and this is fitted on a nozzle part 24 of a plasma torch 1. The metal piece 31 is secured to a positive electrode 20 using bolts 32. A plasma jet 4 formed in this nozzle part 24 melts the fusion spray material 30 of sleeve form and produces liquid state particulates. When the material 30 is made in a sleeve form, the area touching the plasma jet 4 increases, and a great quantity of liquid particulates are produced. Fusion spray can be repeated however many times if the material 30 is equipped with a large wall thickness.