The present invention provides a magnetic memory device capable of stably writing information by efficiently using a magnetic field generated by current flowing in a conductor, which can be manufactured more easily, and a method of manufacturing the magnetic memory device. The method includes: a stacked body forming step of forming a pair of stacked bodies S20a and S20b on a substrate 31; a lower yoke forming step of forming a lower yoke 4B so as to cover at least the pair of stacked bodies S20a and S20b; and a write line forming step of simultaneously forming a pair of first parts 6F and write bit lines 5a and 5b so as to be disposed adjacent to each other in a first level L1 via an insulating film 7A as a first insulating film on the lower yoke 4B. Thus, the manufacturing process can be more simplified.