To provide an attachment structure in which center shafts of a plunger and a coil housing substantially coincide and an actuation of an electromagnetic valve is satisfactory.

An electromagnetic valve 2 includes a valve cartridge 40 and a coil structure 30, the valve cartridge including a plunger 11 having a seal element 10, a valve seat 44 on which the seal element sits, a tubular valve insert 13 that accommodates the plunger, and a cover disc 16 arranged and fixed on an outer periphery of the valve insert, the coil structure including a coil 14 that forms a magnetic circuit for driving the plunger, and a coil housing 15 that surrounds the coil, the cover disc including a first annular portion 17 in which the coil housing can be fitted into a part of the outer periphery, and a second annular portion 18 arranged concentric with the first annular portion, and the second annular portion being fitted and fixed in a recess 19 formed in a fluid block 1.