To provide a penetration rod with a radio communication function that can receive an underground measurement signal with excellent sensitivity.

There is provided a penetration rod with a radio communication function constituted such that a rod body 10 including sensors 11, 12, 13, and 14 for measuring an underground physical quantity or chemical quantity is made to penetrate the ground while additionally connecting extension rods 30 and various geological features are measured in the process of the penetration. A measurement signal can be transmitted to the tail end of the extension rods 30 by wiring cables 15, 32 in the respective rods 10, 30, providing connectors 16, 33, and 34 at connection parts of the respective rods 10, 30, and electrically connecting the connectors, and the measurement signal is transmitted by radio to a receiver on the ground by electrically connecting a radio communication unit 70 to the connector 33 at the tail end. In this configuration, the radio communication unit 70 is positioned on the ground side, so a storage device on the ground can receive the measurement signal with excellent sensitivity.