There is provided an electrical connector housing including a printed circuit board, which is designed to avoid the formation of unusable space. The electrical connector housing which contains such a printed circuit board includes conductor patterns, bus bar circuitry including a plurality of bus bars, and an electronic component including a plurality of lead terminals. Further, the printed circuit board and the bus bar circuitry are arranged side by side on a same plane. Some of the plurality of the lead terminals are electrically connected to the conductor patterns, while the other lead terminals are electrically connected to the bus bars.