Abstract: In the present disclosure, a seatback pocket is introduced, which includes a backboard combined with a rear side of a seatback and including a hinge shaft provided at a lower end in left and right width directions; a pocket member having a hinge part formed at a lower end and combined with the hinge shaft through a hinge structure to be rotated based on the hinge shaft to provide a pocket space in a region facing the backboard; and an elastic member connected between both ends of the pocket member and the backboard in a shape blocking sides of the pocket space, and configured to provide an elastic restoring force with respect to a rotation direction of the pocket member.

Abstract: A side table assembly for a vehicle seat includes a table on which a cup holder inserting part is formed, a body arranged on a side face of the vehicle seat, a joint hinge device coupled between the body and the table to allow the table to be rotated with respect to the body; and a cup holder having an opened upper face and a closed lower face and coupled to the cup holder inserting part. The joint hinge device includes a joint hinge connected to the table at one side and connected to the body at another side, a hinge spring inserted into the joint hinge to elastically support the joint hinge, and a hinge cylinder having one side inserted into the joint hinge and being in contact with the hinge spring and another side inserted into by the body.