The invention relates to an industrial robot having an appa ratus for driving an
attachable/detachable four-bar link mechanism, comprising: a base frame having a rotating
joint for a robotbody; a pivot frame which is coupled to the rotating joint and which has a
rotating joint; a column frame which is coupled to the rotating joint of the pivot frame, and
which has a straight-line joint; a motor arranged in the pivot frame to rotate the column
frame; a decelerator attachably/detachably mounted on the rotating joint of the pivot frame or …