Magnetic memory device

A magnetic memory device includes a lower magnetic track layer extending in a first direction and including a plurality of first magnetic domains, a spacer layer on the lower magnetic track layer and extending in the first direction, an upper magnetic track layer on the spacer layer and extending in the first direction, the upper magnetic track layer including a plurality of second magnetic domains, and a plurality of read units on the upper magnetic track layer and arranged apart from one another in the first direction, wherein the plurality of first magnetic domains and the plurality of second magnetic domains have magnetization directions parallel to each other at positions overlapping each other in a second direction perpendicular to the first direction.