Abstract: A three-dimensional location measurement sensor including first and second rotation plates to rotate about a fixed axial member independently of each other, a camera, formed inside the fixed axial member in the middle of the second rotation plate, a mirror, to be supported by a mirror supporting unit so as to be disposed over the camera, the mirror supporting unit being fixed to the first rotation plate, at least one light source, to be supported by a light source supporting unit so as to be disposed between the mirror and the second rotation plate, the light source supporting unit being fixed to the first rotation plate, a mark, to be supported by a mark supporting unit so as to be disposed between the mirror and the second rotation plate, the mark supporting unit being formed on the second rotation plate, and a gear unit, which is formed at an outer circumference of the second rotation plate and adjusts an inclination angle of the mirror.