PROBLEM TO BE SOLVED: To provide a front opening outer garment capable of adjusting restraint capability of the waist part by opening and closing an engaging device in the main front part.SOLUTION: There is provided the front opening outer garment in which a compensation inner having an elongation rate larger than an outer cloth is sewn on the inside of the outer cloth. In the front opening outer garment, the ratio A:B is 1:0.90-1:0.99, wherein A represents the peripheral length of the outer cloth from the convex to the concave of the engaging device and B represents the peripheral length of the back side from the convex to the concave of the engaging device on the same position of the back side.COPYRIGHT: (C)2013,JPO&INPIT【課題】前身頃の係止具を開閉することにより腰部の緊締強度を調節することのできる前開き外衣を提供する。【解決手段】表地の内側に、表地より伸長率の大きい補整用インナーを縫着した前開き外衣であって、該前開き外衣の係止具凸から係止具凹までの表地周長Aと、同じ位置の裏側の係止具凸から係止具凹までの裏側周長Bの比A:Bが1:0.90~1:0.99であることを特徴とする前開き外衣。【選択図】図1