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 light transmitted through the light route control member according to a movement of electrophoretic particles, wherein the light modification part includes a partition wall part and a receiving part that are alternately arranged, wherein a light transmittance of the receiving part comprising the electrophoretic particles is changed according to the application of a voltage to the first and second electrodes, wherein the partition wall part includes a base partition wall part disposed on the first electrode below the receiving part and a separation partition wall part disposed on the base partition wall part wherein the light route control member is adapted to switch between a first mode and a second mode, a viewing angle defined by light transmitted through the light route control member being narrower in the first mode than in the second mode, wherein a plurality of pores is disposed in the separation partition wall part and optionally in the base partition wall part, wherein the pores include air, wherein, due to the pores, a density per unit area of the partition wall material of the separation partition wall part is smaller than the density per unit area of the partition wall material of the base partition wall part, and wherein the volume of the pores decreases while extending from the separation partition wall part to the base partition wall part inside the separation partition wall part. 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 light transmitted through the light route control member according to a movement of electrophoretic particles, wherein the light modification part includes a partition wall part and a receiving part that are alternately arranged, wherein a light transmittance of the receiving part comprising the electrophoretic particles is changed according to the application of a voltage to the first and second electrodes, wherein the partition wall part includes a base partition wall part disposed on the first electrode below the receiving part and a separation partition wall part disposed on the base partition wall part wherein the light route control member is adapted to switch between a first mode and a second mode, a viewing angle defined by light transmitted through the light route control member being narrower in the first mode than in the second mode, wherein a plurality of pores is disposed in the separation partition wall part and optionally in the base partition wall part, wherein the pores include air, wherein, due to the pores, a density per unit area of the partition wall material of the separation partition wall part is smaller than the density per unit area of the partition wall material of the base partition wall part, and wherein the volume of the pores decreases while extending from the separation partition wall part to the base partition wall part inside the separation partition wall part.