PURPOSE: To provide the classifying device of simple constitution which follows up vibration in external input while suppressing time astableness as to a classifying device for multidimensional time space patterns which are successive with time like a speech signal and an image signal.

CONSTITUTION: A pseudo neural cell element 1 fires when the weighted sum of external inputs from external signal input means 2 exceeds a threshold value. When plural pseudo neural cell elements 1 fire, a pseudo neural cell element 4 fires to suppress the pseudo neural cell elements 1 so that the pseudo neural cell elements 1 do not fire. Therefore, only the pseudo neural cell element 1 which obtains the maximum weighted sum of external inputs stably fires following the external inputs. Pseudo neural cell elements 3 corresponding to classification categories fire only when the pseudo neural cell element 1 coupled by a signal transmitting means 6 stably fires, so plural elements do not fire at the same time.