A conduction path (20) is formed by connecting a coated wire (26), in which a conductor (27) is surrounded by an insulation coating (28), to a rear end part of a terminal fitting (21) and the entire terminal fitting (21) and a front end part of the coated wire (26) are to be accommodated into a housing (10). The conduction path (20) includes a coating layer (29) made of a photocurable resin, provided in an area of the coated wire (26) to be accommodated into the housing (10), thinner than the insulation coating (28) and surrounding an area of the conductor (27) where the insulation coating (28) is removed.