A biological imaging device includes an emitting unit that emits parallel light to a first part of a finger. The device includes an imaging unit that images the first part and a second part connected to the first part. The first part is a fingerprint part between a distal interphalangeal joint and a fingertip, and the second part is a part between a proximal interphalangeal joint and the distal interphalangeal joint. The device includes a finger root guide on which a root of the finger is placed.