A sheet-like substance is pasted onto a sheet supporting portion with the position thereof precisely set. Provided is a sheet pasting jig (1) including a blade portion (3) that is brought into close contact with a pasting surface, which is a surface of a sheet supporting portion onto which a sheet-like substance is pasted, and that is capable of cutting the sheet-like substance between the sheet supporting portion and the blade portion into a piece having an area equivalent to or less than that of the pasting surface and a positioning portion (4) that positions the blade portion (3) and the sheet supporting portion.
