A helmet 1 with a visor formed by integrally joining the preliminarily injection-molded visor 5 to a cap body 3, wherein an opening end edge 9 formed on the cap body is joined to the outer side of a joining wall 17 formed on the visor 5, and the joining wall 17 is held by the opening end edge 9 and a tongue-shaped part 31 formed on the inside of the cap body 3. The joined faces of the visor 5 and the cap body 3 are joined to each other by fusing, an intruding engagement part intruded in a through hole 22 formed in the joining wall 17 is formed at the opening end edge of the cap body 3, and the joining portion of the visor and the cap body is formed in annular shapes.