A first impurity diffusion layer forms one of source/drain regions and also forms a bit line. A first semiconductor layer, a channel semiconductor layer and a second semiconductor layer, which forms the other of source/drain regions and also forms a storage node, are disposed on the first impurity diffusion layer. A capacitor insulating film is disposed on a second conductive layer. A cell plate is disposed on a storage node with the capacitor insulating film therebetween. A capacitance of the bit line is reduced, and a dynamic random access memory thus constructed performs a high-speed operation.