The present invention suppresses the return of the barrel section while ensuring waterproofness against the contact portion with the aluminum core wire. A plurality of concave sections is dispersedly provided on the inner surface of the barrel section. A groove section is provided so as to overlap the sealing member. A ridge portion is provided extending in the crossing direction at a position which does not overlap with the sealing member in plan view and is close to the third region on the side opposite to the terminal section. The barrel section is crimped to the end portion by crimping so that the exposed portion of the aluminum core wire is in contact with the ridge portion, and is sealed with the sealing member.