A fingertip guide of a biological imaging device guides a fingertip, and a light emitting device of the biological imaging device emits light to a first part. An imaging device of the biological imaging device captures a fingerprint of the first part and a blood vessel of a second part by a reflected light and a radiated light. The reflected light is a light emitted by the light emitting device has been reflected on the first part. The radiated light is a light has been propagated inside the second part and has been radiated. At least the second part does not contact any member.