A jig affixing device which affixes a downward eyeball measuring jig comprising: a spectacle hold stand which holds spectacles having an examination spectacle lens attached to a spectacle frame and a measurement tape having a pair of tape-shaped masks, the mask having a tape base, an adhesive portion disposed on the side of the tape base facing the examination spectacle lens, and a plurality of lines a lens carrying portion made of low impact resilience material and disposed on the upper surface of the spectacle hold stand at a position corresponding to the examination spectacle lens and a frame support member attached to the upper surface of the spectacle hold stand in such a condition as to be movable in a direction perpendicular to the horizontal direction of the examination spectacle lens to support the spectacle frame.
