Abstract: The light pinpointing device is for producing a pinpointing light signal at an operative center point of a robot tool. The pinpointing light signal is useful to properly position the robot tool during the teaching phase. The light pinpointing device comprises a frame having first and second opposite ends, the first end being provided with a fastener for fastening the frame to an end of the robot tool. A light source assembly is provided to produce a pair of light beams inside the frame. A lens in front of the light source assembly is provided for directing the light beams through the second end of the frame in converging directions so that the light beams intersect with each other at a distance from the end of the robot tool corresponding to the operative center point thereof, thereby providing the pinpointing light signal.