A rotor manufacturing method comprises an arranging step for arranging a rotor core, which is formed by stacking electromagnetic steel plates, to direct the stacked electromagnetic steel plates toward a vertical direction, a guide inserting step for inserting a rod-like guide into a magnet insertion hole formed to extend in the stacked direction of the rotor core after the arranging step, a sheet inserting step for inserting a plurality of sheets from above the rotor core into the magnet insertion hole along different side surfaces of the guide after the guide inserting step, a guide pull-out step for pulling out the guide from the magnet insertion hole after the sheet inserting step, and a magnet inserting step for inserting a permanent magnet between the plurality of sheets within the magnet insertion hole after the guide pull-out step.