Electromagnetic actuator, manufacturing method thereof, and fuel injection valve

A magnetism property of an armature (24) is increase by including a moving core (34) of sintered metal of 1LSS to 3LSS, and a shaft (35) of a ferromagnetic material. By contrast, a stator core (32) contains 0.005 to 0.1 weight % resin powder, whose particle diameter is set to 50 µm or less, in particular, 25 µm or less, so as to decrease a core loss and increase a magnetism property. The stator core (32) thereby becomes approximately equivalent to the armature (24) in a direct current magnetism property, so that an electromagnetic actuator and a fuel injection valve (1) that are excel in suction force and response are provided.