A light route control member comprising: a first substrate; a first electrode disposed on the first substrate; a second substrate disposed on the first substrate; a second electrode disposed under the second substrate; and a light modification part disposed between the first electrode and the second electrode and adapted to change a viewing angle of a light transmitted through the light route control member, wherein the light modification part includes a partition wall part and a receiving part that are alternately arranged, wherein a light transmittance of the light modification part is changed according to a voltage applied to the first electrode and the second electrode, wherein the receiving part includes a dispersion and electrophoretic particles dispersed in the dispersion, wherein the partition wall part includes a first partition wall part disposed closer to the first electrode than the second electrode and defined as a region between an upper surface of the first electrode and a lower surface of the receiving part, and a second partition wall part disposed closer to the second electrode than the first electrode and defined as a region between a plurality of receiving parts in a region between the first partition wall part and the second electrode among the partition wall part, characterized in that a refractive index of the partition wall part is 1.36 to 1.64; a refractive index of the receiving part is 1.40 to 1.45; wherein refractive indices of the first partition wall part and the second partition wall part and the receiving part are different to each other, and wherein a ratio of refractive index of the first partition wall part, the second partition wall part, and the receiving part is 0.9-1:0.95-1.05:1. a first substrate; a first electrode disposed on the first substrate; a second substrate disposed on the first substrate; a second electrode disposed under the second substrate; and a light modification part disposed between the first electrode and the second electrode and adapted to change a viewing angle of a light transmitted through the light route control member, wherein the light modification part includes a partition wall part and a receiving part that are alternately arranged, wherein a light transmittance of the light modification part is changed according to a voltage applied to the first electrode and the second electrode, wherein the receiving part includes a dispersion and electrophoretic particles dispersed in the dispersion, wherein the partition wall part includes a first partition wall part disposed closer to the first electrode than the second electrode and defined as a region between an upper surface of the first electrode and a lower surface of the receiving part, and a second partition wall part disposed closer to the second electrode than the first electrode and defined as a region between a plurality of receiving parts in a region between the first partition wall part and the second electrode among the partition wall part, characterized in that a refractive index of the partition wall part is 1.36 to 1.64; a refractive index of the receiving part is 1.40 to 1.45; wherein refractive indices of the first partition wall part and the second partition wall part and the receiving part are different to each other, and wherein a ratio of refractive index of the first partition wall part, the second partition wall part, and the receiving part is 0.9-1:0.95-1.05:1.