A car roof had to be cut off by firefighters as they reached a child following a two-car collision.
The emergency services were called to the A19 northbound at Sheraton, close to the A179 turn off, after the crash.
A crew of firefighters from Stranton Fire Station in Hartlepool and two appliances from Stockton were sent to the scene, at 7.40pm yesterday.
A spokeswoman for Cleveland Fire and Rescue Service said: "The fire brigade cut a roof off and one child was then taken to hospital by ambulance."
The incident was brought to a close by 8.20pm.