a horizontal multi - joint robot includes : a first joint capable of swiveling around a first axis ; a second joint capable of swiveling around a second axis that is parallel to and spaced apart from the first axis ; and a duct connected between the first joint and the second joint . the first joint has a first connecting portion forming a predetermined angle relative to the first axis . the second joint has a second connecting portion forming a predetermined angle relative to the second axis . the duct has a first end and a second end . the first end is connected to the first connecting portion . the second end is connected to the second connecting portion .