To provide an image-distributing device for distributing the moving picture of an operation site to a plurality of clients during such treatment action as an operation without requiring any technical knowledge related to computers and communication.

The image-distributing device is provided with a dial-up communication part 30 for digitally communicating with one or a plurality of clients, an Internet communication part 60 for digitally communicating with one or a plurality of clients, an image input interface 26 where at least a moving picture signal picked up by the image pickup device being provided at an optical device for medical use, an encoding part 20 for encoding the moving picture image to a digital image signal at a preset data rate, and an image distribution part 40 for distributing at least one of digital image signals at one or a plurality data rates via the dial-up communication part or the Internet communication part toward the plurality of clients.