Abstract: In a method for manufacturing a monolithic ceramic electronic component, metal thin-films to be processed into internal electrodes are formed on green ceramic sheets and include first metal particles and second metal particles that are more oxidizable than the first metal. The internal electrodes are formed in a firing step such that the second metal particles located near the interfaces between the metal thin-films and the green ceramic sheets are selectively oxidized and the second metal particles located in inner portions of the metal thin-films are deposited outside the metal thin-films and oxidized such that oxide layers including the oxidized second metal particles are formed along the interfaces and the first metal particles are sintered such that the first metal particles grow along the oxide layers.