A circuit board includes a wiring board on which is mounted first and second laminated ceramic capacitors near or adjacent to each other, arranged along a direction parallel or substantially parallel to a main surface of the wiring board, and electrically connected in series or in parallel via a conductive pattern provided on the wiring board. One width direction side surface of the first laminated ceramic capacitor and one length direction end surface of the second laminated ceramic capacitor oppose each other perpendicularly or approximately perpendicularly.