To realize a circuit component with a coil which is simple in structure and manufactured without using a die and has excellent magnetic properties and a shielding action.

An air-core coil 11 is buried in resin 12 loaded with ferrite powder and iron powder as its air core is filled up with the resin 12, and the terminal 13 of a winding is led outside, The magnetic powder-loaded resin 12 filled in the air core of the coil 11 serves as a magnetic core, and the magnetic powder-loaded resin 12 which seals up the coil 11 covering it serves as a magnetic shielding member. The magnetic powder-loaded resin is varied in content or kind of magnetic powder depending on the part. of the circuit part equipped with a coil, or irregularities are provided to the surface of the molded coil 11, by which the circuit part equipped with a coil can be easily regulated in electromagnetic properties or shielding action, so that a circuit part such as a high-performance, inexpensive and small inductor or the like can be realized.