A probe comprising: a transmitting and receiving unit in which an ultrasonic wave transmitting and receiving unit for transmitting and receiving an ultrasonic wave and a light transmitting and receiving unit for transmitting and receiving light are arranged, the probe being configured to transmit an ultrasonic wave and light while the transmitting and receiving unit rotates, wherein a reflected wave and a reflected light can be transmitted to an imaging apparatus for diagnosis which uses the reflected wave received by the ultrasonic wave transmitting and receiving unit from a biological tissue and the reflected light received by the light transmitting and receiving unit from a biological tissue to generate an ultrasonic wave tomographic image and a light tomographic image of the biological tissue in an axial direction, while the probe moves inside a body lumen in the axial direction, and wherein the ultrasonic wave transmitting and receiving unit and the light transmitting and receiving unit are arranged so as to make an angular difference θ [degrees] formed between the ultrasonic wave transmitting and receiving unit and the light transmitting and receiving unit in an azimuth angle direction to be proportional to a distance L [mm] between a position of the ultrasonic wave transmitting and receiving unit in the axial direction and a position of the light transmitting and receiving unit in the axial direction and a rotary velocity ω [r/s] of the transmitting and receiving unit, and be inversely proportional to a movement velocity V in [mm/s] of the transmitting and receiving unit in the axial direction, and wherein the ultrasound wave transmitting and receiving unit and the light transmitting and receiving unit are either arranged on the rotary center axis or in positions at equivalent distances from the rotary center axis along the axial direction. a transmitting and receiving unit in which an ultrasonic wave transmitting and receiving unit for transmitting and receiving an ultrasonic wave and a light transmitting and receiving unit for transmitting and receiving light are arranged, the probe being configured to transmit an ultrasonic wave and light while the transmitting and receiving unit rotates, wherein a reflected wave and a reflected light can be transmitted to an imaging apparatus for diagnosis which uses the reflected wave received by the ultrasonic wave transmitting and receiving unit from a biological tissue and the reflected light received by the light transmitting and receiving unit from a biological tissue to generate an ultrasonic wave tomographic image and a light tomographic image of the biological tissue in an axial direction, while the probe moves inside a body lumen in the axial direction, and wherein the ultrasonic wave transmitting and receiving unit and the light transmitting and receiving unit are arranged so as to make an angular difference θ [degrees] formed between the ultrasonic wave transmitting and receiving unit and the light transmitting and receiving unit in an azimuth angle direction to be proportional to a distance L [mm] between a position of the ultrasonic wave transmitting and receiving unit in the axial direction and a position of the light transmitting and receiving unit in the axial direction and a rotary velocity ω [r/s] of the transmitting and receiving unit, and be inversely proportional to a movement velocity V in [mm/s] of the transmitting and receiving unit in the axial direction, and wherein the ultrasound wave transmitting and receiving unit and the light transmitting and receiving unit are either arranged on the rotary center axis or in positions at equivalent distances from the rotary center axis along the axial direction.