The invention provides a semiconductor device where data can be written after the production and forgery caused by rewriting of data can be prevented, and which can be manufactured at a low cost using a simple structure and an inexpensive material. Further, the invention provides a semiconductor device having the aforementioned functions, where wireless communication is not blocked by the internal structure. The semiconductor device of the invention has an organic memory provided with a memory cell array including a plurality of memory cells, a control circuit for controlling the organic memory, and a wire for connecting an antenna. Each of the plurality of memory cells has a transistor and a memory element. The memory element has a structure where an organic compound layer is provided between a first conductive layer and a second conductive layer. The second conductive layer is formed in a linear shape.