Circuit board

A circuit board (100) is provided with: a first circuit board (10) provided with a first frame ground (12FG) on which an external interface connector (40) is mounted, a first signal ground (12SG), anda connection member (13) providing high-frequency connection between the first frame ground (12FG) and the first signal ground (12SG); and a second circuit board (20) having disposed thereon a secondframe ground (22FG), a second signal ground (22SG), and a connection member (23) providing high-frequency connection between the second frame ground (22FG) and the second signal ground (22SG). The first signal ground (12SG) and the second signal ground (22SG) are electrically connected to each other. The first frame ground (12FG) and the second frame ground (22FG) are electrically connected to each other. 电路基板(100)具有第1电路基板(10)和第2电路基板(20)，该第1电路基板(10)具有：第1框架接地(12FG)，在其安装外部接口连接器(40)；第1信号接地(12SG)；以及连接部件(13)，其将第1框架接地(12FG)与第1信号接地(12SG)之间高频连接，在该第2电路基板(20)配置有：第2框架接地(22FG)；第2信号接地(22SG)；以及连接部件(23)，其将第2框架接地(22FG)与第2信号接地(22SG)之间