A tablet comprising: a tablet body portion having a three dimensional shape; and a protruding portion continuously protruding from a side surface of the tablet body portion to an outside in an orthogonal direction to a height direction of the tablet body portion, wherein the protruding portion has a first protruding portion and a second protruding portion protruding in opposite directions from each other via the tablet body portion, the first protruding portion and the second protruding portion are disposed at different height positions from each other, the first protruding portion protrudes from an upper portion of the side surface of the tablet body portion, the second protruding portion protrudes from a lower portion of the side surface of the tablet body portion, the first protruding portion and the second protruding portion are formed to have a narrower width as the first and the second protruding portions are away from the tablet body portion, the first protruding portion is formed such that an upper surface of the first protruding portion is substantially flush with the upper surface of the tablet body portion, the second protruding portion is formed such that a bottom surface of the second protruding portion is substantially flush with a bottom surface of the tablet body portion, the bottom surface of the first protruding portion extends in a planar form in a positional relation orthogonal or intersecting to the side surface of the tablet body portion, and the upper surface of the second protruding portion extends in a planar form in a positional relation orthogonal or intersecting to the side surface of the tablet body portion. a tablet body portion having a three dimensional shape; and a protruding portion continuously protruding from a side surface of the tablet body portion to an outside in an orthogonal direction to a height direction of the tablet body portion, wherein the protruding portion has a first protruding portion and a second protruding portion protruding in opposite directions from each other via the tablet body portion, the first protruding portion and the second protruding portion are disposed at different height positions from each other, the first protruding portion protrudes from an upper portion of the side surface of the tablet body portion, the second protruding portion protrudes from a lower portion of the side surface of the tablet body portion, the first protruding portion and the second protruding portion are formed to have a narrower width as the first and the second protruding portions are away from the tablet body portion, the first protruding portion is formed such that an upper surface of the first protruding portion is substantially flush with the upper surface of the tablet body portion, the second protruding portion is formed such that a bottom surface of the second protruding portion is substantially flush with a bottom surface of the tablet body portion, the bottom surface of the first protruding portion extends in a planar form in a positional relation orthogonal or intersecting to the side surface of the tablet body portion, and the upper surface of the second protruding portion extends in a planar form in a positional relation orthogonal or intersecting to the side surface of the tablet body portion.