The accident occurred in Khandar area of Nowshera district yesterday when the rickshaw, carrying eight persons, collided with the dumper truck, police said.
Six persons died on the spot and the two persons wounded in the accident were rushed to a nearby hospital, Dawn newspaper reported.
The condition of one wounded is critical. All the passengers travelling in the rickshaw belonged to the same family.
The truck involved in the fatal mishap has been impounded and the search for the driver is going on.