<p>The present invention relates to a hold and drive power transmission unit in a nut fastening apparatus using an automatic nut runner. The hold and drive power transmission unit of the present invention comprises: a first spur gear connected to the nut runner; a second spur gear interconnected with the first spur gear; a third spur gear sharing the same axis with the second spur gear; a fourth spur gear interconnected with the third spur gear; a nut socket connected to the fourth spur gear; and a bolt hold socket placed inside the fourth spur gear. The first spur gear and the fourth spur gear are distanced from each other.</p>
