Heat conduction member

A heat conduction member comprising:

• a cylindrical ceramic body having passages passing through from one end face to the other end face and allowing a first fluid as a heating body to flow therethrough,
• a metal pipe on the outer periphery side of the cylindrical ceramic body, and
• an intermediate member held between the cylindrical ceramic body and the metal pipe and made of material having at least a part having a Young's modulus of 150 GPa or less and at least part having a heat conductivity of 1W/m·K of more;
• wherein the first fluid is allowed to flow through the inside of the cylindrical ceramic body while a second fluid having lower temperature than that of the first fluid is allowed to flow on the outer peripheral face side of the metal pipe to perform heat exchange between the first fluid and the second fluid, and
• wherein the inner diameter of the metal pipe satisfies the relation:
• d+2×c−975×β×d<D<d+2×c−125×(β−α)×d,
• and
• wherein c is a thickness if the intermediate member, d is the outer diameter of the cylindrical ceramic body at 25° C., D is the inner diameter of the metal pipe, α is a thermal expansion coefficient of the cylindrical ceramic body and β is a thermal expansion coefficient of the metal pipe.