To provide a striking penetration testing device for striking a rod to penetrate into the ground and inspecting the stratum structure and ground strength of the point.

The striking penetration testing device 1 includes a hammer unit 90 for applying striking force to a hammer 94; a hammer lifting chain unit 80 for guiding the hammer 94 of the hammer unit 90 liftably; a hammer lifting motor unit 50 having a hammer lifting motor 51 which is a drive source of the hammer lifting chain unit 80; and a transmission unit 60 for transmitting the driving of the hammer lifting motor 51 to the hammer lifting chain unit 80. These units are respectively separable and can be conveyed separately. The transmission unit 60 can be mounted to the hammer lifting motor unit 50 only by rotationally operating a main driving shaft 76 provided inside.