A light emitting device comprising: a first light source and a second light source; a light-guiding plate having a first main surface, a second main surface, a first end surface, and a second end surface, the first main surface and the second main surface facing each other, the first end surface facing the first light source, the second end surface facing the first end surface and the second light source; a prism sheet disposed to face the first main surface; and a reflection sheet disposed to face the second main surface, the light-guiding plate including a plurality of first slope sections and a plurality of second slope sections both provided on one of the first main surface and the second main surface, the plurality of first slope sections being provided to allow the light-guiding plate to be thinner in a first direction that extends from the first end surface to the second end surface, the plurality of second slope sections being provided to allow the light-guiding plate to be thicker in the first direction, and each being provided alternately with each of the first slope sections in the first direction, and the first slope sections and the second slope sections are both provided on the one of the first main surface and the second main surface in such a manner that a proportion of area occupied by the plurality of second slope sections increases in a predetermined range from the second end surface, as a distance from the second end surface increases, characterized in that the light-guiding plate includes a third slope section and a fourth slope section both provided in each of regions in which a predetermined number of first slope sections of the plurality of first slope sections are provided, the third slope section being provided to allow the light guiding plate to be thinner in the first direction, and the fourth slope section being provided to allow the light-guiding plate to be thicker in the first direction. a first light source and a second light source; a light-guiding plate having a first main surface, a second main surface, a first end surface, and a second end surface, the first main surface and the second main surface facing each other, the first end surface facing the first light source, the second end surface facing the first end surface and the second light source; a prism sheet disposed to face the first main surface; and a reflection sheet disposed to face the second main surface, the light-guiding plate including a plurality of first slope sections and a plurality of second slope sections both provided on one of the first main surface and the second main surface, the plurality of first slope sections being provided to allow the light-guiding plate to be thinner in a first direction that extends from the first end surface to the second end surface, the plurality of second slope sections being provided to allow the light-guiding plate to be thicker in the first direction, and each being provided alternately with each of the first slope sections in the first direction, and the first slope sections and the second slope sections are both provided on the one of the first main surface and the second main surface in such a manner that a proportion of area occupied by the plurality of second slope sections increases in a predetermined range from the second end surface, as a distance from the second end surface increases, characterized in that the light-guiding plate includes a third slope section and a fourth slope section both provided in each of regions in which a predetermined number of first slope sections of the plurality of first slope sections are provided, the third slope section being provided to allow the light guiding plate to be thinner in the first direction, and the fourth slope section being provided to allow the light-guiding plate to be thicker in the first direction.