A method for manufacturing a magnetic sheet comprising: a heat treating step of subjecting a thin sheet-shaped magnetic body made from an Fe-based metal magnetic material and having a thickness of 15 μm to 35 μm to a heat treatment; a laminating step of holding the thin sheet-shaped magnetic body subjected to the heat treatment on a resin film with an adhesive layer sandwiched between the thin sheet-shaped magnetic body and the resin film, to constitute the magnetic sheet; and a cutting step of cutting the magnetic sheet into a predetermined shape, wherein the method further comprises a step of applying an external force to a plurality of places on a surface of the magnetic sheet after the laminating step; and a step of producing cracks starting from the places to which the external force is applied, by winding the magnetic sheet around a roll, to divide the thin sheet-shaped magnetic body into a plurality of pieces, the heat treatment is to set an AC relative magnetic permeability μr of the thin sheet-shaped magnetic body at a frequency of 500 kHz to 220 or more and 770 or less, the Fe-based metal magnetic material is represented by the following formula: Fe100-a-b-cBaSibCc, and a, b, and c respectively satisfy 7 ≤ a ≤ 20, 8 ≤ b ≤ 19, 0 ≤ c ≤ 4, and 75 ≤ 100-a-b-c ≤ 85 in atom%, the Fe-based metal magnetic material is obtained by making the Fe-based metal magnetic material from an amorphous alloy and crystallizing at least a part of the structure thereof during the heat treatment, at least part of the Si forms a silicide of Fe 3 Si precipitated in the Fe-based metal magnetic material obtained, characterised in that the step of applying the external force to the plurality of places on the surface of the magnetic sheet is performed simultaneously with the cutting step by using a projection group on a press die. a heat treating step of subjecting a thin sheet-shaped magnetic body made from an Fe-based metal magnetic material and having a thickness of 15 μm to 35 μm to a heat treatment; a laminating step of holding the thin sheet-shaped magnetic body subjected to the heat treatment on a resin film with an adhesive layer sandwiched between the thin sheet-shaped magnetic body and the resin film, to constitute the magnetic sheet; and a cutting step of cutting the magnetic sheet into a predetermined shape, wherein the method further comprises a step of applying an external force to a plurality of places on a surface of the magnetic sheet after the laminating step; and a step of producing cracks starting from the places to which the external force is applied, by winding the magnetic sheet around a roll, to divide the thin sheet-shaped magnetic body into a plurality of pieces, the heat treatment is to set an AC relative magnetic permeability μr of the thin sheet-shaped magnetic body at a frequency of 500 kHz to 220 or more and 770 or less, the Fe-based metal magnetic material is represented by the following formula: Fe100-a-b-cBaSibCc, and a, b, and c respectively satisfy 7 ≤ a ≤ 20, 8 ≤ b ≤ 19, 0 ≤ c ≤ 4, and 75 ≤ 100-a-b-c ≤ 85 in atom%, the Fe-based metal magnetic material is obtained by making the Fe-based metal magnetic material from an amorphous alloy and crystallizing at least a part of the structure thereof during the heat treatment, at least part of the Si forms a silicide of Fe 3 Si precipitated in the Fe-based metal magnetic material obtained, characterised in that the step of applying the external force to the plurality of places on the surface of the magnetic sheet is performed simultaneously with the cutting step by using a projection group on a press die.