Provided is a probe and a measurement system which uses the probe. According to one implementation, the probe includes a radiated-light measurement optical system and an oblique-viewing imaging device. The radiated-light measurement optical system irradiates illumination light onto a measurement target region on a biological tissue. The oblique-viewing imaging device has an angular field α and a forward tilt angle β defined by a center axis of a field of view and a radial direction of the probe. The radiated-light measurement optical system has an optical element that determines a direction of emission of the illumination light, and a forward tilt angle γ is defined by the direction of emission and the radial direction of the probe. The oblique-viewing imaging device and the optical element are positioned such that the measurement target region lies within the angular field.
