To provide a back cover with subheading, which is accurately represented according to change of kind of filed material content by displaying a plurality of subheadings on the back cover according to the kind of the material content other than by displaying a main head even when the material content filed in a main file is divided into a plurality of kinds.

In the back cover with subheading, two gaps are provided by doubly covering the back cover of the main file with a transparent or translucent material cover. The main head is inserted in one gap, and a plurality of partitions are provided in the other gap to insert the plural subheadings.