To provide a muffle system of an oven for dentistry in which it is possible to improve the operability and the cost side.

The muffle system (10) of the oven for dentistry is equipped with a muffle base (12), and a muffle cylinder (14) is extended therefrom. A mold which consists of melting materials, specifically a wax mold, can be mounted on the muffle cylinder (14), and this can be embedded with a forming material. Therefore, a fitted body (16) which surrounds the muffle cylinder (14) is equipped, and this is removable to contain a ceramic material.