A St John ambulance spokesman said they were called to the scene about 4.31 this afternoon, with an ambulance arriving shortly afterwards at 4.51pm.
It appeared there were a total of eight occupants in the cars and seven of them had been injured, he said.
Two of them were in serious conditions and the others sustained moderate injuries, he said.
They were transported to Rotorua Hospital, some by road and others by a rescue helicopter, about 5.17pm.
He did not know how old the occupants were or whether there were children in the cars.