PURPOSE:To reduce the user's fatigue during steady glazing by easing his nerve and to make this implement convenient to carry by mounting a recess fitting snugly to the face and a cord or the like for wearing in the large-sized opening part of a hollow truncated square cone body, making the inside surface black and constituting these in such a way that all the ridgelines concentrate at one point. CONSTITUTION:An implement 10 for concentration of thinking is formed to a hollow truncated square cone body by bending cardboard or plastic sheet, and its inside surface is colored black. The user puts the hollow notch 18a of the lower panel 18 in a large-sized opening part B on his nose part, and the arc- shaped notch 14a of an upper panel 14 on its forehead, fixes a rubber cord 22 to the head part M, and observes part of a mechanical device or the like. Since the inside surface of the panel is painted black, the user's nerve is eased and the fatigue during steady glazing is reduced. This is so constituted that all the ridgelines concentrate at one point, and since it is foldable, it is convenient to carry.
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