To provide a cooling device of a robot hand in a high temperature heat treatment chamber capable of preventing the thermal deformation, the thermal damage and the deterioration of a component material of the robot hand in the high temperature heat treatment chamber, dispensing with the troublesome replacing work, and remarkably improving the efficiency and the productivity of the high temperature heat treatment work.

In this cooling device of the robot hand in the high temperature heat treatment chamber, a water channel groove is formed on an upper face of the robot hand, a tubular member is inserted into the water channel groove to allow the cooling water to flow the water channel groove to adjust a temperature, a water pressure and a flow rate, and an upper part of the tubular member is covered by a lid part.