The product of a photocatalyst with antimicrobial function was examined to develop of new photocatalyst utilization products on a plastic resin surface. The samples with poly propylene to be used as backing utilized 2 kinds of marketed photocatalyst coating material. Both had antimicrobial effects against Escherichia coli NBRC3972 and Staphylococcus aureus N8RC12732. However, antifungal effect against Aspergillus niger NBRC6341 and Penicillium funiculosum NBRC6345 was absent. Melamine resin tableware with a photocatalyst had an antimicrobial effect in an irradiation test of UV (300-380nm) intensity 0.lmW/cm² regulated at JIS R 1702,a s well as in an irradiation test with solar light through a window . Developed product had photocatalyst antimicrobe function suitable for the practical use, in geriatric nursing facilities and in hospitals.