In an absorbent product in which an absorbent sheet member having an opening and a back sheet are overlapped, a rear pocket is formed between a rear absorbent core of the absorbent sheet member and the back sheet, and side pockets are formed on both sides of the opening. By contracting elastic members bonded to a core covering sheet on the both sides of the opening, the core covering sheet of the absorbent sheet member and the back sheet largely stand up in each side pocket, and the rear absorbent core is raised upward. Thus, it is possible to keep the distance large in a thickness direction between the absorbent sheet member and the back sheet in the vicinity of the opening and to fit a portion around the opening of the absorbent sheet member to a wearer.