PROBLEM TO BE SOLVED: To provide a new microbial catalyst that has excellent storage stability, causes a small environmental diffusion after being sprayed to exert a small influence on the ecosystem, does not obtain new unknown ability from, in particular, the environment, and can be used in microbial pesticide.SOLUTION: A microbial catalyst is provided which comprises dried bacterial cells obtained by culturing a microorganism expressing one or more enzymes, adding a diluent to the culture, and spray drying it.SELECTED DRAWING: Figure 2