To provide a light control sheet suitable for directional control of oblique input light having a spread angle, and to provide a surface light source device and a liquid crystal display utilizing the light control sheet.

Main and sub luminous fluxes from the output surface are directionally controlled with the light control sheet 41 arranged along the output surface of a light guide plate, and outputted in the desired direction. Main light beam S1 is emitted from a light emitting surface, passing through a first surface 41a (small angle refraction), internally reflected (total reflection) in a first slope region 41b, and outputted from a light output surface 41c (SS1). A first light beam T1 passes through the first surface 41a (small angle refraction), internally reflected with a second slope region 41b (total reflection), and is outputted from the light output surface 41c (TT1). Second sub-light beam T2 is outputted from the light output surface 41c after two times of internal reflection.