Memory card

The inventio provides a memory card advantageous for coping with an increase of storage capacity. As an embodiment of the present invention, a memory card is formed in a rectangular thin-plate form, by a housing that is made of an insulated material and in that a recessed part is formed on the top surface being one surface in the thickness direction, and a rectangular multi-chip package contained in the recessed part. The housing has a rectangular bottom wall and side walls standing from three of the four sides of the bottom wall. In these side walls, two side walls face to each other, and the remaining one side wall connects one end part of these side walls. The recessed part is formed to be open upward and sideward by the bottom wall and the three side walls.