To prevent the clogging of piping and hole used for the adjustment of inner pressure.

This vessel system for supplying molten metal is provided with a vessel which can hold the molten metal, a hatch which is arranged so as to be openable/closable at the upper surface part of the vessel and has continued space where a pressurized gas can pass from the outer part into the inner part of the vessel, and piping which is arranged in a zone belonging to the upper side of the vessel and at the position except the zone where the hatch is arranged, allows the inner part to communicate with the outer part of the vessel and has a flowing path allowing the molten metal to flow.