The invention relates to a device (100) for identifying or authenticating a person by a print thereof, the identification or authentication device (100) including: a bearing means (102, 130) including a transparent base (130) and a transparent block (102) supported by said base (130) on which the part of the body carrying the print is pressed, the surface of the transparent block (102) on which the part of the body carrying the print is pressed having a test chart (132), the transparent block (102) being made of a flexible material that deforms and fits the shape of the part of the body carrying the print when the latter is pressed against the former, a means (106, 126) for capturing an image of said print and the test chart (132) through said bearing means (102, 130), a means (108) for analyzing the image of the deformed test chart (132), a means (110) for constructing a template of the print according to the print thus captured and the image of the test chart (132) thus analyzed, a means (114) for verifying the identity of the person or a means (114) for authenticating the person according to the template thus constructed.