<p>PURPOSE: A memory module assembly is provided to lower a height from a motherboard to a memory module by arranging a socket having the memory module in an accommodating groove. CONSTITUTION: A motherboard (110) has an accommodating groove. A socket (120) is formed in the accommodating groove and fixed to the motherboard. A memory module (130) is mounted on the socket. The memory module is electrically connected to the motherboard by the medium of the socket. The thickness of the socket is less than the total thickness of the thickness of the motherboard and the thickness of the memory module.</p>
