NOVELTY - The plate (20) has a plate-shaped insulating plate body (21) with an insulating property, and injection holes (21a) passing through the insulating plate body in a thickness direction and through which electrolyte is injected. A filter member (22) permeable to the electrolyte is provided on one of the surfaces of the insulating plate body, so as to cover the injection holes. The insulating plate body is made of a thermoplastic resin. The filter member is made of a non-woven fabric. A binder is mixed in the filter member.    USE - Insulating plate for use in a non-aqueous electrolyte secondary cell (claimed) i.e. lithium ion cell.    ADVANTAGE - The filter member is placed between a roll end of a cell element and a cover member that seals the opening of a can body when the cell element is housed in the can body of a cell can, so that the cell element is formed by stacking the cathodes and the anodes through the separators, thus ensuring that the movement of the cell element is suppressed, and hence improving impact resistance and vibration resistance without causing leakage of the electrolyte and damage to the cell element. The filter member is not separated from the insulating plate body, so that the work of attaching the insulating plate is easily performed. The insulating plate body and the filter member are partially welded by ultrasonic waves, so that the insulating plate is integrally handled, thus securely preventing the contamination with metal powder. The physical property values of the insulating plate body are close to the physical property values of the filter member, so that the insulating plate body and the filter member show same behaviors, thus preventing deformation, and falling, and securely inhibiting contamination with metal powder.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following:    (1) a non-aqueous electrolyte secondary cell comprising a cell element formed by stacking cathodes and anodes through separators    (2) a method for producing an insulating plate of a non-aqueous electrolyte secondary cell.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of an insulating plate of a non-aqueous electrolyte secondary cell.    Insulating plate (20)    Insulating plate body (21)    Injection holes (21a)    Central hole (21b)    Filter member (22)