There is provided a soft magnetic member comprising a resin film 11 and a soft magnetic layer formed on the resin film 11, the soft magnetic layer comprising a T-L composition layer 7, wherein T is Fe or FeCO, and L is at least one element selected from the group consisting of C, B and N, and a Co based amorphous alloy layer 3 formed on either of the surfaces of the T-L composition layer 7. The Co based amorphous alloy layer 3 is combined with the T-L composition layer 7 to give a magnetic thin film for high frequency simultaneously exhibiting a high permeability and a high saturated magnetization. The magnetic thin film for high frequency can be formed on the resin film 11 because the magnetic thin film can exhibit excellent properties without a high-temperature heat treatment.