Provided is a method for simply producing potassium titanate at low cost, said potassium titanate having high thermal stability and a significantly reduced fibrous content. A method for producing potassium titanate, which is characterized in that: a starting material mixture, which contains a titanium compound and a potassium compound so that the molar ratio expressed by (the number of moles of the titanium compound in terms of titanium atoms)/(the number of moles of the potassium compound in terms of potassium atoms) is 2.7-3.3, is heated and calcined so that the heating rate from 1,000 DEG C to the highest calcination temperature is 15 DEG C/min or less when the starting material mixture is heated to the highest calcination temperature that is higher than 1,000 DEG C; after that the resulting product is cooled so that the cooling rate from the highest calcination temperature to 500 DEG C is 100 DEG C/min or more; and the thus-obtained cooled product is pulverized.