Abstract: A retaining assembly of a binder comprises a layering and a lodging body. Two sides of the layering are provided with a clip notch respectively. The lodging body is lodged to the layering. The lodging body has connection pieces, hooks and hook pieces. The connection pieces are connected to the hooks. The connection piece is formed by bending one end of the hook to reach an angle. The hook piece is formed by bending another end of the hook to reach the angle. Since the hook pieces pass through the through holes of the loose leaf binder, the through holes are fit to the hooks. Afterward, when the connection pieces and the hook pieces are lodged in the corresponding clip notches, the loose leaf binder is positioned on the lodging body.