In a cylinder head of an engine having an intake port communicating with an combustion chamber of the engine, a mount structure for an engine accessory includes an engine accessory, an accessory mount portion provided on the cylinder head and to which the engine accessory is mounted, and a fuel injection device mount portion provided on the cylinder head and to which a fuel injection device for injecting fuel into the intake port is mounted. The accessory mount portion is joined to the fuel injection device mount portion.