A metal grid includes: a valve metal plate which includes a curved principal surface； an anodic oxide film which is formed on the principal surface of the valve metal plate； and a lattice structure which has an uneven shape periodically formed on the anodic oxide film. Further, a production method for a metal grid includes: a step of bending a principal surface of a valve metal plate including the principal surface； a step of forming an anodic oxide film on the principal surface of the valve metal plate； and a step of forming a lattice structure with a periodic uneven shape on the anodic oxide film by forming an etching mask with a periodic opening on a surface of the anodic oxide film and etching the anodic oxide film through the opening.
