A method of manufacturing a light scattering sheet comprising: 1) manufacturing a mixture solution of a polymer comprising a crystal domain and a solvent; 2) increasing a temperature of the mixture solution to a temperature at which the polymer is dissolved in the solvent; 3) adding quantum dots to the mixture solution and then cooling the mixture solution to generate particles where the polymer is recrystallized; and 4) manufacturing the light scattering sheet by using a composition comprising the particles formed in step 3), wherein the polymer used is the polymer having a dissolution temperature of 70 °C or more and 180 °C or less, wherein the light scattering sheet comprises: a light conversion layer, wherein the light conversion layer comprises a particle which comprises a polymer comprising a crystal domain; and quantum dots dispersed in the crystal domain of the polymer, and when a longest direction is defined as an X-axis, a direction that is vertical to the X-axis in a plane direction is defined as a Y-axis, and a direction that is vertical to the X-axis and the Y-axis in a thickness direction is defined as a Z-axis, a size of the particle is 0.1 μm or more and 50 μm or less in the X-axis, 0.1 μm or more and 50 μm or less in the Y-axis, and 0.1 μm or more and 50 μm or less in the Z-axis, wherein the quantum dots are dispersed between polymer chains of the crystal domain. 1) manufacturing a mixture solution of a polymer comprising a crystal domain and a solvent; 2) increasing a temperature of the mixture solution to a temperature at which the polymer is dissolved in the solvent; 3) adding quantum dots to the mixture solution and then cooling the mixture solution to generate particles where the polymer is recrystallized; and 4) manufacturing the light scattering sheet by using a composition comprising the particles formed in step 3), wherein the polymer used is the polymer having a dissolution temperature of 70 °C or more and 180 °C or less, wherein the light scattering sheet comprises: a light conversion layer, wherein the light conversion layer comprises a particle which comprises a polymer comprising a crystal domain; and quantum dots dispersed in the crystal domain of the polymer, and when a longest direction is defined as an X-axis, a direction that is vertical to the X-axis in a plane direction is defined as a Y-axis, and a direction that is vertical to the X-axis and the Y-axis in a thickness direction is defined as a Z-axis, a size of the particle is 0.1 μm or more and 50 μm or less in the X-axis, 0.1 μm or more and 50 μm or less in the Y-axis, and 0.1 μm or more and 50 μm or less in the Z-axis, wherein the quantum dots are dispersed between polymer chains of the crystal domain. a light conversion layer, wherein the light conversion layer comprises a particle which comprises a polymer comprising a crystal domain; and quantum dots dispersed in the crystal domain of the polymer, and when a longest direction is defined as an X-axis, a direction that is vertical to the X-axis in a plane direction is defined as a Y-axis, and a direction that is vertical to the X-axis and the Y-axis in a thickness direction is defined as a Z-axis, a size of the particle is 0.1 μm or more and 50 μm or less in the X-axis, 0.1 μm or more and 50 μm or less in the Y-axis, and 0.1 μm or more and 50 μm or less in the Z-axis, wherein the quantum dots are dispersed between polymer chains of the crystal domain.