For quantitative measurement of reflected light from a clinical diagnostic scrip, a prototype of reflectance photometer was designed. The strip loader and cassette were made to obtain more accurate re(leclance parameters. The strop was illuminated at $45^{circ}C$ through optical fiber and the intensity of reflected light was determined at rectangulat angle using a photodiode. The kubelka-munk coefficient and reflection optical density were determined ar four different wavelengths(500,550,570 and 610nm) for blood glucose strip. For higher concentration than 300mg/dl about glucose, a saturation state of absorbance was observed at 500,550 and 570nm. The correlation between glucose concentration and parameters was the best at 610nm.