A mounting structure for use in mounting a semiconductor package on an circuit board, said semiconductor package including a semiconductor element having a first face, a second face opposite to said first face, and a side face extending between said first and said second faces, an electrode provided on said first face, and a conductive lead having a first and a second end opposite to each other, said first end being conductively connected to said electrode, said second end being noncondutively connected to said second surface, said lead extending to face said side face, said circuit board having a principal board surface, said mounting structure comprising:
- a wiring pattern formed on said principal board surface;
- and
- connection means coupled to said circuit board for connecting said semiconductor package with said wiring pattern.