Information transmission device

An information transmission device comprising:

• a communication unit that receives, when a power supply vehicle moves to a general vehicle and charges the general vehicle, position information indicating a current position of the power supply vehicle from at least one of the power supply vehicle and the general vehicle;
• a control unit that generates display information based on the position information that has been received, and causes the communication unit to transmit the display information to one or more information terminals;
• and
• a storage unit for storing map information including road width information, and does not include the power supply vehicle in the display information when the power supply vehicle is located on a road with a road width equal to or greater than a predetermined value.