More than 40 children and staff on a school trip to Hunstanton escaped serious injury when their coach crashed on the A10 at Hilgay.
The coach was travelling towards King’s Lynn when it left the road, rolled over and came to rest in a field at around 11am on Tuesday.
Fire crews, police, paramedics and the air ambulance were called to the scene and the driver needed to be cut free from the vehicle.
He was taken to Lynn’s Queen Elizabeth Hospital with back injuries.
A number of the youngsters were treated for shock at the scene, but did not need hospital treatment.
The bus had been carrying 42 primary school children, five members of staff and one parent helper from Whittlesford, near Cambridge, on a day out.
Tesco at Downham Market provided drinks and biscuits to the passengers and they returned to school in the afternoon.
The A10 was closed for in both directions while the coach was recovered, with heavy traffic diverted through Hilgay village.
Witnesses to the crash are asked to call police on 101.