Device for capturing a print of a body part comprising a plurality of optically coupled elements comprising: • a first transparent plate comprising an upper face on which the part of the body bearing the print to be imaged can rest; • a light source; • a light-impermeable screen located under the first transparent plate; • a second transparent plate located under the opaque screen; • a sensor comprising light-sensitive photoreceptors located under the second transparent plate providing information enabling to generate an image of the print; the faces of the transparent plates, the opaque screen and the sensor being parallel, characterised in that: the light source generates light beams passing through at least the first transparent plate in the direction of the upper face having an incident angle with respect to a normal to the said upper face of a value less than a critical angle given by the refractive indices of the first plate and of the air and beyond which critical angle a light ray is totally reflected by said upper face in the presence of air above said upper face; the opaque screen comprises an array of holes such that each light ray directed towards the sensor which reaches the opaque screen at a hole passes through the opaque screen and reaches the sensor; each light-sensitive photoreceptor of the sensor is positioned at positions of the sensor that can be hit by a light ray emanating from the body part after diffusion in the body part having an angle of incidence with respect to said normal lying between the critical angle and the limit angle, the limit angle being given by the refractive indices of the first plate and of the skin and beyond which limit angle a light ray is totally reflected by said upper face in the presence of a ridge of the skin above said upper face; each point of the body part in contact with the upper face is imaged by at least one photoreceptor of said sensor. • a first transparent plate comprising an upper face on which the part of the body bearing the print to be imaged can rest; • a light source; • a light-impermeable screen located under the first transparent plate; • a second transparent plate located under the opaque screen; • a sensor comprising light-sensitive photoreceptors located under the second transparent plate providing information enabling to generate an image of the print; the light source generates light beams passing through at least the first transparent plate in the direction of the upper face having an incident angle with respect to a normal to the said upper face of a value less than a critical angle given by the refractive indices of the first plate and of the air and beyond which critical angle a light ray is totally reflected by said upper face in the presence of air above said upper face; the opaque screen comprises an array of holes such that each light ray directed towards the sensor which reaches the opaque screen at a hole passes through the opaque screen and reaches the sensor; each light-sensitive photoreceptor of the sensor is positioned at positions of the sensor that can be hit by a light ray emanating from the body part after diffusion in the body part having an angle of incidence with respect to said normal lying between the critical angle and the limit angle, the limit angle being given by the refractive indices of the first plate and of the skin and beyond which limit angle a light ray is totally reflected by said upper face in the presence of a ridge of the skin above said upper face; each point of the body part in contact with the upper face is imaged by at least one photoreceptor of said sensor.