PROBLEM TO BE SOLVED: To provide a sealing face clarification device capable of clearly seeing a sealing face of a seal irrespective of a shape, a material, a color and a dirty state of the seal.;SOLUTION: A sealing face clarification device includes a substrate 11 having light transmissivity and flexible sheets 12 and 13 having flexibility and overlapped on the surface of the substrate, where brightness of the flexible sheet 12 that is the closest to a surface 11a of the substrate 11 has higher brightness than the other flexible sheet 13, and a sealing surface S1 of a seal S is pressed against the flexible sheet 13 that is the farthest to the surface 11a of the substrate 11 and accordingly the sealing surface is clearly displayed irrespective of a shape, a material, a color and a dirty state of the pressed seal. The sealing face can be visually checked, and computerizing of the sealing face even when being photographed by an electronic camera can be easily clearly performed.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2019,JPO&INPIT
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