Another first-class cricketer Sajjadul Hasan was also killed in the same accident, which occurred when a motorbike ridden by Manjural hit railings on a bridge at Kartikdanga, 380 km (234 miles) southwest of the capital Dhaka.
They were travelling to a nearby town after a domestic match at their Khulna home town, police said.
Manjural made his one-day international debut against England at Chittagong in November 2003 and took 23 wickets in 25 matches.
He also claimed five wickets from six Tests after his Test debut against Zimbabwe at Harare in February 2004.
Hasan, a batsman, scored 2,443 runs from 50 first-class domestic matches, according to the BCB.