A connector which includes a metal piece, a contact assembly including a body which fixes a plurality of contacts, and a housing in which the contact assembly is inserted, in which the metal piece includes an arm portion which is extended in an arrangement direction of the contacts, an L-shaped portion, and of which an end surface is brought into contact only with a lateral wall of a concave portion of the housing, and a pressing portion which is formed by extending an end surface of the L-shaped portion, and which protrudes from a hole to be brought into contact only with a lateral wall of a recess of the body.