A magnetic device unit disposed on a circuit board is disclosed. The magnetic device comprises a magnetic device and a fixing component. The magnetic device has a conductive wire wound thereon. The conductive wire has a terminal. The fixing component is disposed on the circuit board and comprises a main body and a pin. The pin comprises a first conductive portion, a second conductive portion and a connection portion connecting the first and second conductive portions, wherein the connection portion is embedded in the main body and the second conductive portion is connected to the circuit board. The magnetic device is carried by the main body of the fixing component and the terminal of the conductive wire is connected to the first conductive portion of the pin for the magnetic device to be electrically connected to the circuit board via the pin.