The Chaman border crossing was reopened on Wednesday for transit trade, movement of NATO supplies, and people.
The border will stay open temporarily till Eid al-Adha, tribal elders in Pakistan assured.
Sadiq Achakzai, a tribal leader, said the crossing was reopened so that people stranded on both sides of the border can be home for Eid al-Adha.
Trade between Afghanistan and Pakistan had been suspended at the Chaman crossing in the past four months due to COVID-19.
This had let to protests and sit-ins since June in Pakistan, as nearly 100,000 people in the neighbouring areas were affected and left unemployed.
The Quetta Chamber of Commerce and Industry (QCCI) had also filed a case in the Balochistan High Court against the border closure.
The Special Assistant to Prime Minister on Establishment Ardab Shahzan addressed a meeting on the closure of Chaman border at the Parliament on Wednesday.
Shahzan said that the government was working to increase bilateral trade with Afghanistan, while keeping the COVID-19 pandemic in mind.