Three-dimensional location measurement sensor

A three-dimensional location measurement sensor is provided. The three-dimensional location measurement sensor includes first and second rotation plates, which can rotate about a fixed axial member independently of each other; a camera, which is formed inside the fixed axial member in the middle of the second rotation plate; a mirror, which is supported by a mirror supporting unit and is disposed over the camera, the mirror supporting unit being fixed to the first rotation plate; at least one light source, which is supported by a light source supporting unit and is disposed between the mirror and the second rotation plate, the light source supporting unit being fixed to the first rotation plate; a mark, which is supported by a mark supporting unit and is 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 the outer circumference of the second rotation plate and adjusts the inclination angle of the mirror. Accordingly, it is possible to easily determine the location of a target object by using the three-dimensional location measurement sensor.