A screen that transmits a light according to an image signal includes a flat surface, a plurality of light-guide portions arrayed on the flat surface, and a plurality of lens elements. The light-guide portions have a light incident side and an output side. The plurality of lens elements are provided on the flat surface opposite the incident side of the light-guide portions. The lens elements focus the light according to the image signal. Each of the plurality of light-guide portions has a taper form such that a cross section of each of the light-guide portions gradually reduces from the incident side of the output side thereof.
