Emergency services were called to a two-car collision on the A1066 between Bressingham and Roydon.
The collision happened at about 4pm, yesterday.
Fire crews from Diss and East Harling were called to the scene.
They used small gear to free a woman from one of the cars.
The woman was taken by an ambulance to West Suffolk General Hospital in Bury St Edmunds, with whiplash and neck injuries.
Firefighters made the vehicles and scene safe.