Reconnaissance field investigation conducted by our international team revealed the outline of the 65-km-long surface fault rupture associated with Mw 7.6 earthquake in northern Pakistan on October 8, 2005. Among the historically known large earthquakes along the Indian-Eurasian collision zone and elsewhere in the world, this earthquake provided very rare opportunity to study extensive surface rupture of reverse-fault type. More detailed study on this rupture in March 2006 will make great contribution to the evaluation of future earthquakes from active faults of this type.