The electrical resistance of sulfur has been measured under pressures
up to 100 GPa and temperatures down to 70 mK. Under pressures approach
ing 100 GPa, sulfur shows metallic reflection comparable to that of us
ed Pt electrodes. The temperature dependence of the resistance reveals
metallic behavior, and the sharp drop of the resistance at around 15
K and 100 GPa is due to superconducting transition as the transition t
emperature shows typical magnetic field dependence.