PROBLEM TO BE SOLVED: To provide a subject information acquisition apparatus capable of stabilizing the load on a subject when the subject is held and scanned with a probe to acquire information.SOLUTION: A subject information acquisition apparatus comprises: subject holding means which is composed of a first holding member 4 and a second holding member 5 facing the first holding member 4, and presses and holds a subject 2a by moving at least one of the holding members an acoustic wave probe 6 which is disposed in the opposite side to the plane of the second holding member 5 with which the subject 2a comes into contact, and configured to allow scanning on the second holding member 5 and adjustment means which corrects the holding load on the subject 2a when the holding load on the subject 2a changes.【課題】被検体を挟持し、探触子を走査させることで情報の取得を行う際に、被検体に対する荷重を安定させる被検体情報取得装置を提供する。【解決手段】第一の保持部材4と、第一の保持部材4と対向した第二の保持部材5と、からなり、少なくともいずれかの保持部材を移動させることで被検体2aを圧迫保持する被検体保持手段と、第二の保持部材5の、被検体2aが接する面の反対側に配置され、第二の保持部材5上を走査可能に構成された音響波探触子6と、被検体2aに対する保持荷重が変化した場合に、被検体2aに対する保持荷重を補正する調整手段と、を有する。【選択図】図4