Provided is a coating device and a method capable of coating a conductor of a plurality of electrical wires with coating material with simple configuration and of coating without exposing the conductor. A nozzle and a coating area of a terminal-equipped electrical wire are applied to voltage by a voltage applying unit such as to be electrified with polarity different from each other, and jetting jet liquid forms jet liquid over the whole coating area, forms the coating layer with anticorrosion material on a surface of the terminal-equipped electrical wire, and coats the coating area including a conductor with anticorrosion material without being exposed. Furthermore, it is possible to allow the nozzle jet the jet liquid and to move the nozzle in an arranging direction of the terminal-equipped electrical wire, and also to coat the coating area of the terminal-equipped electrical wire with anticorrosion material.