To detect a fact that a semisolid or solid liquid containing matter such as feces, apart from liquid such as urine is positioned on an absorbent member.SOLUTION: An absorbent member comprises: an absorber 50 having a first surface 51, and a second surface 52 being an opposite surface to the first surface； a first power generation part 60 having a first positive electrode 61 and a first negative electrode 62 arranged to be in contact with the absorber； a separator 80 having a facing surface 81 facing the second surface and an opposite surface 82 to the facing surface； a second power generation part 70 having a second positive electrode 71 and a second negative electrode 72, and generating power when a semisolid or solid liquid containing matter 300 is positioned on the opposite surface side, in which at least one of the second positive electrode and second negative electrode is positioned on the opposite surface side so that when the liquid containing matter is positioned on the opposite surface side, the liquid containing matter becomes a main generation path 120 for generated current in the second power generation part； and a detector for detecting a fact that power is generated on at least the second power generation part.SELECTED DRAWING: Figure 2【課題】尿のような液体とは別に、便のような半固形又は固形の液体含有物が吸収部材に位置したことを検出する。【解決手段】吸収部材は、第１面５１と前記第１面の反対面である第２面５２とを有する吸収体５０と、前記吸収体に接するように配置された第１正極６１及び第１負極６２を備える第１発電部６０と、前記第２面に対向する対向面８１と前記対向面の反対面８２とを有するセパレータ８０と、第２正極７１及び第２負極７２を備え、半固形又は固形の液体含有物３００が前記反対面側に位置することで発電する第２発電部７０であって、前記液体含有物が前記反対面側に位置したときに前記液体含有物が前記第２発電部における発電電流の主な発生経路１２０になるように、前記第２正極及び前記第２負極の少なくとも一方の電極が、前記反対面側に配置された第２発電部と、少なくとも前記第２発電部で発電されたことを検出する検出装置と、を備える。【選択図】図２
