Disclosed is a probe fixing device. The probe fixing device comprises: a probe accommodating unit having a space accommodating a probe and a support supporting the probe at a lower side； and a medium accommodating unit which accommodates a medium between the probe which will be accommodated in the probe accommodating unit and an object body. The probe fixing device according to the present invention is able to obtain desirable optoacoustic imaging signals by making the probe in contact with the object body. In addition, the probe fixing device is fixed on an object body fixing device, thereby preventing attenuation of signals and noise caused by motions of the object body or the probe.탐촉자 고정 장치가 개시된다. 상기 탐촉자 고정 장치는 탐촉자를 수납하기 위한 공간과 상기 탐촉자를 하방 지지하기 위한 지지부가 형성된 탐촉자 수납부 및 상기 탐촉자 수납부에 수납될 상기 탐촉자와 대상체 사이에 채워질 매질을 수용하기 위한 매질 수납부를 포함한다.
