To solve a problem wherein a conventional biological information acquisition device is not designed with consideration of pattern variation of a thin blood vessel, for example, in order to assure the reliability of biometrics authentication, it is necessary to apply complicated imaging processing etc. to biometrics authentication equipment.

The biological information acquisition device D1 is equipped with: an imaging device 31 which has a plurality of pixels PX; a transparent substrate 50 which has a plurality of microlenses 52 prepared corresponding to the plurality of pixels PX; and an optical channel separating layer 32 which is formed so that each of optical channels between a microlens 52 and a pixel PX is separated and has a light shielding structure in which an aperture corresponding to the pixel PX is prepared. The microlens 52 condenses light from a predetermined portion 100 through the aperture to the pixel PX. The minimum lens width of the microlens 52 is 50 m or more. And distance between adjacent microlenses 52, and distance between apertures corresponding to the distance is nearly equal.