The present invention relates to an industrial robot and aims to provide an industrial robot capable of ensuring a long distance from a rotation axis of an arm to a tool mounting portion and accurately positioning the tool mounting portion by a compact structure. In a swing arm 150, the rotation of a tool mounting rotation arm driving motor 311 is transmitted to a pivot shaft 313 via a tool mounting rotation arm driving transmission mechanism 300, the rotation of a tool mounting portion driving motor 411 is transmitted to an intermediate power transmission shaft 422 via a tool mounting portion driving first transmission mechanism 412a, and the rotation of the intermediate power transmission shaft 422 is transmitted to an output power transmission shaft 426 via a tool mounting portion driving second transmission mechanism 412b, thereby rotating a tool mounting portion 170 while being decelerated by a tool mounting portion driving reduction unit 413.