An image processing device is provided with a communication device and a processor. The processor is configured to acquire a first video obtained by imaging outside scenery of a first vehicle, when the processor detects that a second vehicle appears on the first video, implement image processing that degrades visibility of a video with respect to a first image area corresponding to at least a part of the second vehicle on the first video, when the processor detects that the second vehicle appears on the first video and then a specific part of the second vehicle appears on the first video, end the image processing with respect to the first image area and implement image processing that degrades visibility of a video with respect to a second image area corresponding to the specific part of the second vehicle on the first video.