Disclosed is a method of manufacturing a magnetic field shielding sheet. The method of manufacturing a magnetic field shielding sheet formed as a plurality of divided pieces includes preparing a magnetic sheet formed of a magnetic material and having a first area and punching the magnetic sheet to form a shielding sheet using a mold such that the shielding sheet having a second area which is narrower than the first area is separated from the magnetic sheet, wherein the punching of the magnetic sheet to form the shielding sheet includes forming at least one linear slit in an inner region of the second area using the mold such that the shielding sheet is divided into a plurality of pieces while the shielding sheet is separated from the magnetic sheet to have the second area.