To provide a low-cost type discrimination unit distinguishing the type of an imaged test subject with high accuracy by processing a taken image of the test subject imaged by a camera.

In this type discrimination unit 1, a taken image processing part 12 processes the taken image of the test subject imaged by the camera 5 to detect positions of both knees of the test subject to the camera 5. A control part 11 acquires behavior of both the knees of the test subject from the positions of both the knees of the test subject detected in each of the taken images obtained by processing a plurality of the taken images by the taken image processing part 12. The control part 11 distinguishes the type of the test subject from the acquired behavior of both the knees of the test subject.