Provided are a titanium dioxide aqueous dispersion having high dispersibility and little aggregation or coarse particles, and a method for producing the same. The titanium dioxide aqueous dispersion contains titanium dioxide particles having a hydrophobic compound such as a higher fatty acid or a salt thereof on the surface, an aqueous dispersion medium, a nonionic surfactant having an HLB value of 10 or higher, and a basic compound such as an alkanolamine, and the pH is in the 8.5-13 range. The method for producing a titanium dioxide aqueous dispersion has a step for mixing the titanium dioxide particles having a hydrophobic compound on the surface, the aqueous dispersion medium, the nonionic surfactant having an HLB value of 10 or higher, and the basic compound to bring the pH of the aqueous dispersion into the 8.5-13 range.本發明提供具有高的分散性，凝聚或粗粒少之二氧化鈦水性分散體及其製造方法。該分散體包含在表面具有高級脂肪酸或其鹽等疏水性化合物的二氧化鈦粒子、水性分散介質、HLB值為10以上的非離子性界面活性劑與烷醇胺等鹼性化合物，pH為8.5～13之範圍。該製造方法具有混合在表面具有疏水性化合物的二氧化鈦粒子、水性分散介質、HLB值為10以上的非離子性界面活性劑與鹼性化合物，使前述水性分散體的pH成為8.5～13之範圍的步驟。
