The invention relates to a device for identifying a person, comprising a real-image camera (10) for capturing a reflection image of a face (14) of the person in the visible spectral range, a thermal imaging camera (12) for capturing an infrared emissions image of the face of the person, a real-image analysis (16) and an infrared image analysis (18). The real-image camera is designed to transmit the reflection image in the form of reflection image data (20) to the real-image analysis. The thermal imaging camera is designed to transmit the infrared emissions image in the form of infrared image data (22) to the infrared image analysis. The real-image analysis is designed to determine first biometric features (24) of the face from the reflection image data, to receive a reference image (30) comprising a personal identification (36), to determine second biometric features (32) from said reference image and, if the first and second biometric features coincide to a defined degree, to make the personal identification available to an output control (42). The infrared image analysis is designed to detect a temperature distribution (34) from the infrared image data and to determine whether said temperature distribution at least partially approaches a temperature distribution in the face of a living person, and if this is the case, to instruct the output control to output the personal identification.