INFORMATION TRANSMISSION METHOD AND COMMUNICATION DEVICE

By an information transmission method or a communication device, push information is received from a transmission source positioned in the outside, electronic control unit information related to the in-vehicle electronic control unit to be a notification destination of the push information is grasped, and notification of the push information according to the grasped electronic control unit information is performed. By the information transmission method, a wireless communication device is specified, and the push information is transmitted to the wireless communication device.