PURPOSE: To obtain a compact data classifying and storing device which efficiently uses data memory even for the increase of various output data corresponding to each classification, and is constituted of a few circuits.

CONSTITUTION: This device is constituted of a classification data memory 3a classified in accordance with a classification reference, and a data storage data memory 3b for storing only various output data 2 corresponding to each classification, and in order to perform data storage of only a necessary classification range of data, a bit for showing necessity of the data storage is stored in advance in the classification data memory 3a, so that based on this bit, various output data 2 of only the necessary classification range are stored in the data storing data memory 3b.