In a variable reluctance resolver having terminal pins at an insulator, a technique for preventing deformation of the terminal pins, shorting between the terminal pins, and contact failure at portions of the terminal pins is provided. A first insulator 300 is formed together with a terminal pin base 311 on which terminal pins 320 are provided. The terminal pins 320 are connected with end portions of windings of a stator coil 500. A cover 330 is mounted on the terminal pin base 311 by covering, and resin is filled inside the cover 330. The resin is also applied to the stator coil 500. The resin filled inside the cover 330 seals the terminal pins 320, and the cover 330 protects the terminal pins 320.