Disclosed are a terminal allowing work for attaching the cap to the insertion part to eliminate, and to provide in a short time the cap to the insertion part, and a method of forming the cap of the terminal. In a terminal, at a tip end of a tubular insertion part a resin made cap is provided, the insertion part includes an annular portion with narrower diameter than that the insertion part at a tip end thereof, the cap is disposed at the insertion part by a dipping work covering the annular portion in an inner side away from a tip end of the insertion part past the annular portion.