An object of the invention is to reduce an area occupied by a capacitor in a circuit in a semiconductor device, and to downsize a semiconductor device on which the capacitor and an organic memory are mounted. The organic memory and the capacitor, included in a peripheral circuit, in which the same material as the layer containing the organic compound used for the organic memory is used as a dielectric, are used. The peripheral circuit here means a circuit having at least a capacitor such as a resonance circuit, a power supply circuit, a boosting circuit, a DA converter, or a protective circuit. Further, a capacitor in which a semiconductor is used as a dielectric may be provided over the same substrate as well as the capacitor in which the same material as the layer containing the organic compound is used as a dielectric. In this case, it is desirable that the capacitor in which the same material as the layer containing the organic compound is used as a dielectric and the capacitor in which the semiconductor is used as a dielectric are connected to each other in parallel.