A magnetic memory apparatus including a memory cell region and a
peripheral circuitry region mounted on a substrate is provided. The
memory cell region includes first wiring, second wiring that
three-dimensionally intersects with the first wiring, and a
magnetoresistance effect type memory device disposed in an intersecting
region of the first and the second wiring for storing and reproducing
information of a magnetic spin. The peripheral circuitry region includes
first wiring that is in the same wiring layer as that of the first wiring
in the memory cell region, and second wiring that is in the same wiring
layer as the second wiring in the memory cell, and a magnetic material
layer including a high magnetic permeability layer is formed on both side
surfaces of the first wiring only within the memory cell region and on a
surface opposite to a surface facing the memory device.