The invention provides a laminated shape-retainable sheet which has such a sufficient shape retainability that a user can give a desired shape easily to the sheet, and requires no press working step for giving a curved shape, a core for a headwear brim using the same, a brim of a headwear, and a headwear. In the laminated shape-retainable sheet of the invention, shape-retainable sheets each comprising a thermoplastic resin and each having shape retainability in a monoaxial direction are laminated and bonded onto each other in such a manner that the monoaxial directions of adjacent sheets out of the shape-retainable sheets make a predetermined angle, in particular, 45 to 90 degrees.