To provide a vacuum induction furnace facility in which the furnace body can be replaced quickly and conveniently.

The vacuum induction furnace IF is constituted by sidetracking a core truck TK provided with a vacuum door closing the side opening of a vacuum chamber VC and a core frame CF into the vacuum chamber VC. When replacement of the core frame CF is required, the core truck TK is separated from the vacuum chamber VC and retreated along a rail RL. Subsequently, another core truck TK is sidetracked into the vacuum chamber VC thus replacing the core chamber CF of the vacuum induction furnace IF.