A high frequency adapter electrically connecting a docking device to a circuit board. The high frequency adapter includes an insulating body, a high frequency signal terminal conductively connected to the circuit board, and two grounding terminals located at two sides of the high frequency signal terminal and conductively connected to the circuit board. Lateral projections of the high frequency signal terminal and the two grounding terminals are approximately the same and overlapping. Both the high frequency signal terminal and the two grounding terminals are pressed by the docking device.