To provide an automatic manufacturing method and manufacturing apparatus having high reliability for a magnetic device.

A manufacturing process for a magnetic device 100 is constituted of a step for preparing a planar type wiring assembly 195, and a step for bonding and fixing a first core part 110 of a magnet core to a second core part 150 of the magnet core in the vicinity of the planar type wiring assembly 195, by the use of automatic taking-out and arranging means. The magnet core is constructed so that a desired magnetic characteristic is distributed to the planar type winding assembly 195, and these core parts 110 and 150 of the first and the second cores, respectively, are fixed to the planar type winding assembly 195 without the application of a large pressure force.