A method of evaluating a composite resin, comprising: preparing a demonstration instrument including: artificial teeth for restoration which are formed by forming cavities having predetermined shapes and depths at predetermined positions of artificial teeth having predetermined shapes and predetermined color tones or by providing defect parts having predetermined shapes at predetermined positions of the artificial teeth; a display plate having a display surface capable of holding a plurality of the artificial teeth for restoration side by side; wherein the plurality of artificial teeth for restoration is held on the display surface side by side so that the cavities or the defect parts are observable by an observer; restoring the cavities or defect parts of artificial teeth for restoration using a composite resin to be evaluated to produce restoring samples in each of the plurality of artificial teeth for restoration, wherein each restoring sample has an observation surface having a first surface region and a second surface region, an artificial teeth portion being exposed to the first surface, a restored portion by the composite resin being exposed to the second surface region, comparing a restoration condition of the observation surfaces of the plurality of restoring samples held side by side on the display to evaluate a range of hues and/or color tones to which the composite resin is applicable, the restored product being obtained by restoring the cavities or the defect parts of the plurality of artificial teeth for restoration with the composite resin. preparing a demonstration instrument including: artificial teeth for restoration which are formed by forming cavities having predetermined shapes and depths at predetermined positions of artificial teeth having predetermined shapes and predetermined color tones or by providing defect parts having predetermined shapes at predetermined positions of the artificial teeth; a display plate having a display surface capable of holding a plurality of the artificial teeth for restoration side by side; wherein the plurality of artificial teeth for restoration is held on the display surface side by side so that the cavities or the defect parts are observable by an observer; artificial teeth for restoration which are formed by forming cavities having predetermined shapes and depths at predetermined positions of artificial teeth having predetermined shapes and predetermined color tones or by providing defect parts having predetermined shapes at predetermined positions of the artificial teeth; a display plate having a display surface capable of holding a plurality of the artificial teeth for restoration side by side; wherein the plurality of artificial teeth for restoration is held on the display surface side by side so that the cavities or the defect parts are observable by an observer; restoring the cavities or defect parts of artificial teeth for restoration using a composite resin to be evaluated to produce restoring samples in each of the plurality of artificial teeth for restoration, wherein each restoring sample has an observation surface having a first surface region and a second surface region, an artificial teeth portion being exposed to the first surface, a restored portion by the composite resin being exposed to the second surface region, comparing a restoration condition of the observation surfaces of the plurality of restoring samples held side by side on the display to evaluate a range of hues and/or color tones to which the composite resin is applicable, the restored product being obtained by restoring the cavities or the defect parts of the plurality of artificial teeth for restoration with the composite resin.