An aqueous agrochemical suspension composition which contains: bispyribac-sodium which is solid at room temperature and has a solubility in water of at least 2 g/100 ml at 20°C; at least one kind of a water-soluble compound selected from the group consisting of; inorganic acids selected from hydrochloric acid, sulfuric acid, phosphoric acid, nitric acid and boric acid; salts of an inorganic acid selected from the group consisting of alkali metal salts selected from disodium hydrogenphosphate, sodium sulfate, potassium sulfate, sodium nitrate, sodium carbonate, sodium hydrogen carbonate, sodium chloride, potassium chloride and sodium borate, alkaline earth metal salts selected from calcium chloride and magnesium chloride and ammonium salts selected from ammonium sulfate, and ammonium nitrate; organic acids selected from the group consisting of acetic acid, citric acid, maleic acid, fumaric acid and tartaric acid; salts of the organic acid selected from the group consisting of alkali metal salts selected from sodium acetate, sodium tartarate and sodium citrate, alkaline earth metal salts and ammonium salts of the organic acid; and sodium hydroxide; and water, the component having a solubility at 20°C of smaller than 2 g/100 ml in an aqueous solution of the component of which the compounding proportion of the component and water is the same as that in the composition. bispyribac-sodium which is solid at room temperature and has a solubility in water of at least 2 g/100 ml at 20°C; at least one kind of a water-soluble compound selected from the group consisting of; inorganic acids selected from hydrochloric acid, sulfuric acid, phosphoric acid, nitric acid and boric acid; salts of an inorganic acid selected from the group consisting of alkali metal salts selected from disodium hydrogenphosphate, sodium sulfate, potassium sulfate, sodium nitrate, sodium carbonate, sodium hydrogen carbonate, sodium chloride, potassium chloride and sodium borate, alkaline earth metal salts selected from calcium chloride and magnesium chloride and ammonium salts selected from ammonium sulfate, and ammonium nitrate; organic acids selected from the group consisting of acetic acid, citric acid, maleic acid, fumaric acid and tartaric acid; salts of the organic acid selected from the group consisting of alkali metal salts selected from sodium acetate, sodium tartarate and sodium citrate, alkaline earth metal salts and ammonium salts of the organic acid; and sodium hydroxide; and inorganic acids selected from hydrochloric acid, sulfuric acid, phosphoric acid, nitric acid and boric acid; salts of an inorganic acid selected from the group consisting of alkali metal salts selected from disodium hydrogenphosphate, sodium sulfate, potassium sulfate, sodium nitrate, sodium carbonate, sodium hydrogen carbonate, sodium chloride, potassium chloride and sodium borate, alkaline earth metal salts selected from calcium chloride and magnesium chloride and ammonium salts selected from ammonium sulfate, and ammonium nitrate; organic acids selected from the group consisting of acetic acid, citric acid, maleic acid, fumaric acid and tartaric acid; salts of the organic acid selected from the group consisting of alkali metal salts selected from sodium acetate, sodium tartarate and sodium citrate, alkaline earth metal salts and ammonium salts of the organic acid; and sodium hydroxide; water,