To provide a method for manufacturing a solenoid valve, reducing concentricity of a yoke part and a core part without deteriorating attraction force characteristics of a plunger.

A magnetic resistance part 50 is formed by filling an annular hollow part 25 of a magnetic member 23a having a diffusion prevention layer 51 formed thereon, with nonmagnetic powder, and sintering it. A stator core 23 is manufactured in such a manner that the yoke part 30 and the core part 40 are magnetically separated by the magnetic resistance part 50, by machining an inner circumference surface of the magnetic member 23a and an inner circumference surface of the magnetic resistance part 50.