To provide a plate management method capable of easily managing the form of an end member without making a mistake about the correspondence between an actual end member and stored information.

A recording medium 1 is attached to an end member WA which is a plate remaining after part of a plate material W is cut away. Information showing the form of the end member WA is recorded on the recording medium 1 as end member information D serving as information about the end member WA. Alternatively, identification information for obtaining information on the form of the end member WA through collation with a data management means is recorded.