An illuminating device acceding to the present invention has light sources, a light guide body which emits lights incident from the light sources, and a blurring structure, and, on the surface opposing to the emission surface of the light guide body, the light deflection elements which guide lights incident from the light sources toward the emission surface are formed regularly in two-dimensional direction of the first direction and second direction. The blurring structure has a function of blurring the light deflection elements regularly formed in the two-dimensional direction, and this blurring structure converts incident lights into linear lights inclined in the direction of the angle θ with respect to the first direction.