This optical biometric device (1) is equipped with: a plurality of light-transmitting probes (12) and light-receiving probes (13) to be arranged on the surface of the scalp of a subject to be tested a transmitting/receiving-light control unit (21) for obtaining a plurality of units of received-light-amount information pertaining to a plurality of measurement sites, by controlling in a manner such that the light-transmitting probes (12) emit light onto the scalp surface, and the light-receiving probes (13) detect light emitted from the scalp surface a calculation unit (22) for obtaining a plurality of measurement data on the basis of the plurality of units of received-light-amount information and a correlation-coefficient calculation unit (23) for calculating a correlation coefficient expressing the strength of the correlation between each measurement datum. This optical biometric device (1) is further equipped with: a 3D-image-display control unit (32) for obtaining and displaying a 3D-scalp-surface image (41) and/or a 3D-brain-surface image (42) and a correlation-coefficient-display control unit (24) for displaying the measurement points from which measurement data is obtained, on the 3D-scalp-surface image (41) and/or 3D-brain-surface image (42), and also displaying in a manner such that a line segment expressing the size of the correlation coefficient connects the measurement points.Linvention concerne un dispositif biométrique optique (1) pourvu : dune pluralité de sondes émettant de la lumière (12) et de sondes recevant de la lumière (13) à disposer sur la surface du cuir chevelu dun sujet à tester dune unité de commande émettant/recevant de la lumière (21) pour obtenir une pluralité dunités dinformations de quantité de lumière reçue relatives à une pluralité de sites de mesure, par lintermédiaire dune commande permettant de faire en sorte que les sondes émettant de la lumière (12) émettent de la lumière sur la surface du cuir chevelu et les sondes recevant de
