PROBLEM TO BE SOLVED: To provide a disposable diaper including fastening members, which disposable diaper, when a wearer of the disposable diaper uses a heating appliance, can restrain the fastening members from detaching from the diaper body.SOLUTION: A disposable diaper according to the present invention comprises: a diaper body having an absorbent core; left and right fastening members respectively joined to both side edges of a rear part of the diaper body, and outwardly extending in a width direction from the diaper body; first fixing members respectively provided on skin surface sides of the left and right fastening members; and second fixing members which are provided on an outer surface side of a front part of the diaper body, and to which the first fixing members are detachably fastened. The diaper body and the fastening members are joined to each other by a cured material of a reactive urethane hotmelt adhesive.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2020,JPO&INPIT【課題】ファスニンブ部材を備える使い捨ておむつを着用した着用者が、暖房器具を使用した場合に、ファスニング部材のおむつ本体からの脱離が抑制される使い捨ておむつを提供する。【解決手段】 本発明の使い捨ておむつは、吸収コアを有するおむつ本体と、前記おむつ本体の後方部の両側縁部にそれぞれ接合され、前記おむつ本体から幅方向の外側に延びる左右のファスニング部材と、前記左右のファスニング部材の肌面側にそれぞれ設けられた第1止着部材と、前記おむつ本体の前方部の外面側に設けられ、前記第1止着部材が着脱自在に止着される第2止着部材とを有し、前記おむつ本体と前記ファスニング部材とが、反応性ウレタンホットメルト接着剤の硬化物により接合されていることを特徴とする。【選択図】図3