An outdoor outer wear formed by flexible poor quality of cloth is not easy to take off, and the wearing enclosure is not high. The outer wear of the present invention comprises a hood for covering the head of a wearer and a front fastener and/or button splitting a front garment body into right and left parts. Any one or both of the front fastener and/or button is equipped with an opening and enlarging structure for extending an entire circumferential length of an opening formed by the hood. The opening and enlarging structure includes an opening and enlarging fastener separating a textile of the outer wear toward the opening and an opening and enlarging piece functioning as a gore by expanding a part separated by the opening and enlarging fastener inside the opening and enlarging fastener.