Abstract: A printed wiring board is mounted with an electronic component which is provided with grooves at the opposite sides thereof. The grooves are constructed so that the electronic component can be mounted on the printed wiring board in either the vertical or horizontal directions. Preferably, the grooves have a cross-shaped configuration, one extending vertically and one extending horizontally. The grooves may be formed on tongue pieces projecting from the electronic component body. The groove may be provided with a resilient piece. Another groove may be provided on the body so as to be capable of changing the direction of terminals.