A registration apparatus includes an extraction unit that extracts characteristics of a subject of biometric identification at every predetermined period as a characteristics image on the basis of the video signals output from an image pickup element as a result of picking up images of the subject of biometric identification at sequentially differentiated image pickup position in response to a relative movement of the image pickup element and the subject of biometric identification at a predetermined biological site, a degree of similarity detection unit that detects the degree of similarity between the characteristics image currently being processed and the characteristics image processed immediately before the characteristics image currently being processed or the characteristics image to be processed next to the characteristics image currently being processed and a registration unit that registers the characteristics image currently being processed as biometric identification information when the degree of similarity is not lower than a threshold value.
