DEVICE FOR ASSEMBLING RECLINING SEAT OF VEHICLE

The present disclosure provides a reclining seat assembly device for a vehicle in which a guide pin mounted on a mounting frame of a leg unit is inserted into a guide hole formed in a floor panel so as to be prevented from being separated from the guide hole during reclining of a seatback, whereby the reclining seat is prevented from deviating from a predetermined position on the floor panel and subsequent processes for assembling the reclining seat can be smoothly carried out.