The present invention provides a method and device for winding a spiral electrode group for a battery. The method and device wind a continuous strip-shaped positive electrode, negative electrode plate, and separator into a spiral electrode group through a freely rotatable winding core. The edge position of the strip-shaped electrode plate is detected by the edge position detection device at a predetermined position near the winding core, and compared with the reference position, and according to the result, it is grasped by the chuck movable from the electrode plate to the direction perpendicular to the direction of travel of the electrode plate. , after correcting the edge position of the electrode plate, the electrode plate is held by the gripper that is constrained by the guide rail to move only in the direction parallel to the transfer direction of the electrode plate, and the electrode plate is held by the third chuck, and the front end of the electrode plate is supplied to the winding core , The second chuck prevents the positional deviation of the electrode plate and winds the electrode group while applying tension to the electrode plate, thereby performing electrode plate winding with a small deviation in the winding of the electrode group. In addition, the flatness of the electrode during flat shaping can be improved by making the cross-sectional shape of the winding core at right angles to the axial direction substantially hexagonal.