A subject information acquiring apparatus including a cover which intercepts light, two plates which hold a subject, a laser light source, and a probe which receives an acoustic wave generated from the subject to which the light is emitted from the laser light source, wherein the plates, the laser light source, and the probe are covered by the cover, wherein the cover has a first aperture for inserting the subject as part of a subject person into the cover, and a second aperture which can be opened and closed so that an operator can perform a procedure by inserting a hand of the operator into the cover in the position in which the plane extending each of the plates crosses the cover, is used.
