PROBLEM TO BE SOLVED: To provide a manufacturing method of a functional metal oxide material, a ceramic electronic component, and a multilayer ceramic capacitor which have a small variation in a ceramic structure after sintering and a small variation in electric characteristics.SOLUTION: There is provided a manufacturing method of a functional metal oxide material which finally contains at least silicon as an accessory component by 0.2 to 5.0 pts.mol to 100 pts.mol of a main constituent metal element, and the method comprises: a process of crushing and pulverizing a raw material of the functional metal oxide material by cobble stones having silicon nitride as a main component; and a sintering process in which silicon nitride derived from cobble stones is transformed into silicon oxide by oxidation reaction. The metal oxide material has a perovskite type or a spinel type structure. A main component of the functional metal oxide material is barium titanate, quantity of Zr and quantity of Ba contained in the fun
