To obtain biological feature information of high authentication accuracy. A biological feature input device includes an imaging device and a finger guide for guiding the finger to a position at which the image of the finger can be picked up. The finger guide is configured with a finger abutment part which supports a tip side of the finger placed ON the finger guide and a finger holding device which displaces a position of the finger abutment part towards a direction the finger is pointing when the finger is placed ON the abutment part. The finger guide is provided with a guide position detecting part which detects the position of the finger abutment part. The imaging device picks up the image of the finger when the abutment part is detected at a position that is set in advance.
