The present invention relates to a chemical reaction processing apparatus for producing and analyzing a plurality of samples, including a measuring and mixing section for producing the samples in different mixing ratios by mixing raw inorganic materials and for arranging the samples in predetermined quantities on a reaction tray, a heating apparatus section for heat-treating the samples on the reaction tray all at once, an X-ray diffracting apparatus section for sequentially performing the X-ray diffraction measurement on the samples on the reaction tray, and a collating and analyzing apparatus section for analyzing measurement results obtained in the X-ray diffraction apparatus section.