The lining device is intended to line a sewer branch pipe with a lining tube. It includes a holding chamber for the lining tube, the holding chamber having a straight holding-chamber bearing line. Furthermore, it has a reduction piece which is attached to an end side of the holding chamber and has a straight reduction-piece bearing line, which is aligned with the holding-chamber bearing line. Moreover, it has a deflection piece which is provided with a blow-out connection piece for fastening one end of the lining tube to, wherein a position of the blow-out connection piece is settable and adaptable to the position of a junction of the sewer branch pipe leading into the main sewer. Furthermore, it has pressure application device in order to blow out a lining tube, present in the holding chamber and fastened to the blow-out connection piece.