Imaging module for biometrics authentication, biometrics authentication apparatus and prism

An imaging module for biometrics authentication, comprising:

• a light source irradiating a living body with light capable of passing through the living body;
• a prism having an incidence surface including an incidence area for taking in light emerging from the living body, two or more reflecting surfaces for reflecting the light taken in through the incidence area, and an outlet surface for outputting the light reflected by the reflecting surfaces;
• and
• a camera module including a lens for focusing the light emerging from the outlet surface of the prism and an image pickup device for converting the light focused thereon by the lens into an electric signal and outputting the electric signal, wherein the prism is configured so that the light taken in through the incidence area and reflected by a first reflecting surface is reflected by the incidence surface including the incidence area by using the incidence surface also as a second reflecting surface.