The invention provides a fiber collimator array including a fiber array in which a plurality of optical fibers is arrayed and a microlens array in which microlenses are arrayed on positions corresponding to the plurality of optical fibers on a transparent substrate. Each microlens and the transparent substrate are oppositely arranged so that a plurality of projections formed on a bottom face of each microlens intersects with a plurality of projections formed on a surface of the transparent substrate, and each microlens and the transparent substrate are adhered to each other by the adhesive.