An information transmission device applied to an open moving machine driven by a driver who is exposed to an outside of the moving machine includes: a vibrator configured to vibrate a component of the moving machine, the driver in a driving posture being in contact with the component; and a controller communicably connected to an information providing device and configured to control the vibrator and a voice output device configured to output voice to the driver, the information providing device being configured to provide utterance information to the driver as information to be transmitted to the driver. The controller makes the vibrator operate when making the voice output device output the utterance information to the driver by the voice.