To provide a chemicals spraying application device capable of keeping chemicals in a germ-free state, applying the chemicals on the inner surface of a container in a germ-free state, and preventing contamination of the chemicals by replacing the entire unit when the chemicals are contained in a chemicals container.

The chemicals spraying application device 1 comprises at least a chemicals application unit fixing part and the chemicals application unit constituted so as to be separated from the fixing part. A keyboard type pump 11 is disposed in the fixing part. The chemicals unit comprises a chemicals container 12, piping 13 and a chemicals spraying nozzle 14, and is constituted so that the chemicals 12a can be kept in the germ-free state. The piping 13 can supply the chemicals from the chemicals container 12 to the chemicals spraying nozzle 14, and is made of a material applicable for the keyboard type pump 11.