Abstract: In a miniature motor, a rotor being constructed by installing a magnet facing the outer peripheral face of a stator on the inner peripheral face side of a ringlike yoke made of magnetic material and coupled to a rotary shaft, is characterized in that said rotor is supported with a resin-molded discoidal spider incorporating said rotary shaft and said ringlike yoke. A stator housing for a miniature motor for being loaded with a stator to cover the side faces of said stator, equipped with a magnetic shielding plate on its face opposite to said stator and provided with a bearing assembly for supporting a rotor shaft on the inner peripheral side of a boss part in the center of said housing, is characterized in that said stator housing is constructed by molding resin into said housing to incorporate said magnetic shielding plate and said bearing assembly.