To eliminate the need for a trace and a stub which have been required for a conductor layout, on a printed circuit board on which both a transistor and a resistor can be mounted.

In the conductor layout of the printed circuit board, one which both the transistor and the resistor (a zero ohmic resistor in a preferable expamble) can be mounted, signals can be passed selectively when the transistor 300 as a surface mounting component is loaded, and a signal conductor is coupled directly when the resistor 308 is mounted. Two pads 200, 202 for the resistor are formed which having superposing sections with a pad 208 for a source and a pad 212 for a drain in pads for the transistor, and a pad 210 for the gate of the transistor is mounted separately. The places of the coupling or traces and stubs are reduced while mounting both of the resistor and the transistor by using the pads with the superposing sections, and an electromagnetic effect by these places of coupling and the stubs so reduced.