The present invention provides a mirror plate capable of suppressing the occurrence of orange peel-like unevenness. The mirror plate includes a mirror film including a mirror layer and an adhesive layer; and a substrate. The adhesive layer is attached to one surface of the substrate. The one surface of the substrate has an arithmetic average roughness of less than 0.03 μm. The mirror film includes no hard coat layer containing cured resin. The thicknesses of the mirror layer and the adhesive layer have a relation satisfying: tA/tM≤0.18, where tM represents the thickness of the mirror layer and to represents the thickness of the adhesive layer.