Ladies' pants has an inside belt portion that is provided with an eyelet buttonhole as a second buttonhole. A moving cloth is provided inside the inside belt portion. A button is sewn on the moving cloth and is taken out from the eyelet buttonhole so as to be movable inside the eyelet buttonhole. If the button is engaged with the second buttonhole, the eyelet buttonhole is hidden under an outside belt portion. Then, the ladies' pants allows a waist size to continuously change, thereby giving a wearer a relaxed and comfortable wearing feeling. A round part of the eyelet buttonhole is located at a position corresponding to nearly a center of the moving cloth when the moving cloth returns to its original position. Then, even if the button is detached, the button can be stitched by scoop sewing through the round part of the eyelet buttonhole. Thus, the button can be surely reattached to the moving cloth.