To provide an album, in which information capable for seeing or touching for the first time after the elapse of a certain period of time can be hidden.

A block board 1100, to which a not-easily openable thin gimmicky box 100 is mounted, is bound. This gimmicky box 100 comprises a near thin-walled plate-like main body part, a lid body part slidingly mounted to the main body part, and a locking mechanism which locks both the lid part and the main body part with each other under the condition that the former blocks the latter.