An articulated arm type industrial laser robot utilizing laser robot beam passage means for bypassing a beam around a robot body, which is provided with a plurality of rotary joints having a plurality of axes of rotation which are disposed orthogonally to one another and one contractile joint on the laser beam source side, a first laser beam path changing system with a built-in laser beam reflection mirror, a plurality of rotary joints having a plurality of axes of rotation disposed orthogonally on the end side of the second arm, and a second laser beam path changing system with a built-in beam reflection mirror, for coupling and introducing the laser beam emitted from the first laser beam path changing system with and into the end portion of the robot arm on the first arm side. Accordingly, machining and assembling can be made with a desired accuracy of the beam path system as the laser beam path means. Furthermore, even during the robot operation process, the robot operation can be followed up without being affected by various errors inherent in movable portions such as the robot arm, and the laser beam can be introduced accurately into a laser beam emission portion of the wrist.