Recent discoveries of natural gas hydrates in permafrost and sub-oceanic environments have led us to measure the thermal conductivity of methane hydrate. A guarded hot-plate cell was constructed and tested with various ice specimens. We find the conductivity of methane hydrate near -60¿C is 0.45 W/mk, a value close to that obtained for other clathrate hydrates by us and others. It is much lower than for ice (by a factor of about 5), so that a logging tool based on this property should prove to be of use in identification of gas hydrates in permafrost zones.