Crossing was closed on September 30 after NATO helicopters mistakenly killed two Pakistani soldiers.
Pakistan has reopened a border crossing used by NATO to ship supplies to its forces in Afghanistan.
Pakistan closed the Torkham crossing in the Khyber tribal region on September 30, the same day NATO helicopters fired missiles at a Pakistani border post, killing two soldiers.
A joint NATO-Pakistani investigation determined the U.S. pilots mistook the soldiers for militants. The United States has apologized for that strike.
The bottleneck resulting from the border post closure exposed stranded supply trucks and fuel tankers to militant attacks.
Meanwhile, intelligence officials in Pakistan say a U.S. drone attack Sunday killed at least seven people in the country's northwestern tribal area.
Officials say the unmanned aircraft targeted a house in North Waziristan, a known sanctuary of al-Qaida and Taliban militants on the Afghan border.
Earlier Sunday, the Pakistani Taliban claimed responsibility for torching 29 NATO fuel tankers in southwest Pakistan on Saturday.
The Taliban said the attacks would continue until the U.S. stopped drone strikes on Pakistani territory.
Some information for this report provided by AP, AFP and Reuters.