The present invention employs a property information acquiring apparatus comprising: a supporting unit configured to support a test subject and include an aperture into which a tested part of the test subject is inserted a holding unit configured to hold the tested part inserted into the aperture and a pressing unit that includes a receiving unit for receiving information relating to a property of the tested part and is pushed against a surface of the holding unit different from a surface for holding a test object, wherein the supporting unit includes a restricting part that restricts deformation caused in the holding unit by the pressing of the pressing unit.
