A measurement probe includes: a plurality of optical fibers including an illumination fiber configured to propagate light to irradiate a measuring object and including a light receiving fiber configured to receive scattered light retuned from the measuring object; and a detection portion configured to detect contact with the measuring object, the detection portion having a contact part provided on a part of a side portion of the measurement probe, the side portion forming a surface along a longitudinal direction of the measurement probe, the contact part being configured to be in contact with measuring object.