A magnetic shielding sheet and a manufacturing method therefor are provided. The magnetic shielding sheet according to an embodiment of the present invention, which is placed on one surface of an antenna comprising a hollow part disposed at the center thereof and having a predetermined area and a pattern part surrounding the hollow part, may comprise: a sheet body which is made of a magnetic material so as to be able to shield a magnetic field; and at least one eddy current-reducing pattern part which is formed in the sheet body so as to increase the resistance of the sheet body so that the occurrence of eddy current can be reduced.