PROBLEM TO BE SOLVED: To provide an object support apparatus capable of reducing light leakage from between an opening of a support member into which an object is inserted and the object.SOLUTION: The object information acquisition apparatus comprises: a light source 210 a support member 110 for supporting a subject, an opening being formed in the support member, into which an object, a part of the subject, is inserted a detection part 220 for detecting acoustic waves generated from the object onto which light from the light source 210 is projected and converting the detected acoustic waves into electric signals and a processing part for acquiring characteristic information of the inside of the object on the basis of the electrical signals. The support member comprises an opening shape definition part 600 for defining the shape of the opening in the circumference of the opening.COPYRIGHT: (C)2016,JPO&INPIT【課題】被検体を挿入するための支持部材の開口と被検体との間からの光漏れを低減可能な事件体支持装置を提供する。【解決手段】光源と、被検者を支持する支持部材であって、被検者の一部である被検体1を挿入するための開口が空いている支持部材110と、光源210からの光を照射された被検体から発生する音響波を検出して電気信号を出力する検出部220と、電気信号に基づいて、被検体内の特性情報を取得する処理部を有し、支持部材は、開口の周囲において、開口の形状を規定する開口形状規定部600を備える被検体情報取得装置を用いる。【選択図】図2