Recently, studies of acceleration of software operations on a processor have been executed aggressively using Field Programmable Gate Arrays (FPGAs). However, currently available FPGA architecture presents waste under a parallel operation in terms of configuration memory because the same configuration context corresponding to same-function modules must be programmed onto numerous parts of configuration memory. This paper therefore presents a proposal for a parallel-operation-oriented FPGA architecture including a shared common configuration memory. In this research, a parallel-operation-oriented FPGA with four programmable gate arrays sharing a common configuration memory has been designed using a 0.18 μm CMOS process technology. The advantage of the parallel-operation-oriented FPGA is clarified and a design technique to achieve a high-performance parallel-operation-oriented FPGA is discussed.