Provided is a pyribencarb aqueous suspension agrochemical composition which contains an adjuvant for reinforcing the efficacy of pyribencarb, and which is capable of preventing a pharmaceutical preparation from becoming highly viscous or solidified and capable of providing a sufficient controlling effect with a small amount of pyribencarb. The aqueous suspension agrochemical composition includes: pyribencarb which is an agrochemically active component; an adjuvant for pyribencarb, which is one or more compounds selected from polyoxyalkylene siloxanes, polyoxyethylene/polyoxypropylene block copolymers, and polyoxyalkylene alkyl ethers; a nonionic-anionic surfactant which is a polyoxyalkylene aryl ether sulfuric acid salt and/or a polyoxyalkylene aryl ether phosphoric acid salt; and water.