A mount board to be attached to a housing as an attachment target includes a component and a mount portion on which the component is mounted while deviating from a designed mount location of the mount portion. The mount board includes at least one attachment member joined to the mount portion. The at least one attachment member is configured to be attached to the housing. The at least one attachment member includes a configuration defined to be in conformity with information about the deviation of the component from the designed mount location of the mount portion.