To provide a low-cost dental treatment system in which arrangement positions of treatment instruments are freely set relatively to a body of the treatment system and a multi-joint hose has light, easy-to-handle and simple constitution.

This dental treatment system is lightly and inexpensively composed of the multi-joint hose 2 incorporating only a feed circuit for feeding required operation media corresponding to the kinds of treatment instruments 1 and a connecting terminal, and the arrangement positions of the treatment instruments 1 relative to the body 5 of the treatment system and the feed of only the required operation media to the arranged treatment instruments 1 are set by operating a panel switch on a liquid crystal display screen 27 provided on the body 5 of the treatment system.