National Highway 139 (NH 139) is a National Highway in India within the states of Bihar and Jharkhand. NH-139 links Rajhara in Jharkhand (about 17 kilometres (11 mi) north of Daltonganj) to Patna, the state capital of Bihar. This 207-kilometre-long (129 mi) highway passes through Arwal, Daudnagar and Aurangabad.