To facilitate the repair of a sensor, a heater, a controller, or the like, in a heat control vessel used for a desiccator cabinet, an incubator or a dry sterilizer and to improve the handling.

The heat control vessel is provided at least with a heat control vessel body 2 equipped with a temperature sensor 12 and a heater 8 in a housing 4 equipped with an opening and closing door 6 and a controller 20 equipped independently from the heat control vessel body 2 and for controlling power supplied to the heater 8 by taking in a detected signal of the temperature sensor 12. The temperature sensor 12 and the heater 8, and the controller 20 are connected respectively to flexible cables 22 and 26 freely detachably.