NOVELTY - A water-repellent oil-repellent antifouling processing agent contains substance having methylsilyl group and chlorosilyl group as main component, substance having chlorosilyl group as main component or substance having alkoxysilyl group as main component.    USE - Water-repellent oil-repellent antifouling processing agent is used for manufacturing water-repellent antifouling film formed on base material such as metal, semiconductor, glass, synthetic fiber, natural fiber, paper, timber, leather, bamboo and stone for articles such as cover glass of solar-energy utilization apparatus, window glass of vehicles, window glass of buildings, top plate of electromagnetic induction cooking appliance, motor vehicle, solar cell and solar water heater (all claimed). Uses include but are not limited to kitchen-knife, scissor, razor, wristwatch, spectacle frame, kettle, frying pan, refrigerator, television, vehicle component and fishing net.    ADVANTAGE - The antifouling processing agent has excellent water-repellent property and oil-repellent property.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for manufacture of water-repellent oil-repellent processing agent, which involves mixing substance having methylsilyl group and chlorosilyl group as main component, substance having chlorosilyl group as main component or alkoxysilyl group as main component, or substance having methylsilyl and chlorosilyl as main component and microparticles or hollow fine particles, or substance having methylsilyl group and chlorosilyl group as main component, substance having chlorosilyl group as main component, substance having alkoxysilyl group and microparticles or hollow fine particles, or substance having fluorocarbon group, hydrocarbon group and chlorosilyl group as main component and microparticles or hollow fine particles, or substance having fluorocarbon group, hydrocarbon group and chlorosilyl group as main component, substance having chlorosilyl or alkoxysilyl group and microparticles or hollow fine particles, using non-aqueous organic solvent.