A diffuser plate (1) of the present disclosure includes a plurality of fine structures (microlenses (2)) having two or more types of lens functions arranged on a main surface (S1). Intensity of diffused light within a desired diffusion angle range is substantially uniform, and the diffuser plate satisfies a relation of P×P×Sk‰¤400 [µm 2 ] where P is an average pitch of the plurality of fine structures, Sk is a standard deviation of relative luminance of the plurality of fine structures in their front directions, and P‰¤200 [µm] and Sk‰¥0.005. Thus, it is possible to provide a diffuser plate having a simple structure capable of achieving optical properties with little luminance and color unevenness and excellent appearance quality when an image is projected.