To provide a sheet for information hiding superior in printer transportability and printability.

In the sheet for information concealing, both the front and back faces are substantially flat, the sheet has a removable part A in which cover paper 2 is removably applied to base paper 1 and an unremovable part B in which the cover paper is unremovably applied to the base paper and a concealing information filling part 20 in the unremovable part B, the removable part A and the unremovable part B are connected in their boarder 3 so as to be able to be folded.