To make it possible to easily take out a booklet stored in a bookshelf and others.

The bookcase 1, in which a booklet B is stored with one side of the case being opened in one direction, is provided with a closure part 2, which is capable of being opened, for closing at least part of an opening 1s and at least one protruding piece protruding from an opening end 1x, which is an end of the opening 1s, in this case a front protruding piece 21 and a rear protruding piece 22, while the closure part 2 can be pinched with the fingers in its closed state.