A trainee pilot and his instructor have been injured after a glider crashed at Tyagarah airport, near Byron Bay, today.

The trainee pilot, a 58-year-old Ocean Shores man, was attempting to land the glider at Tyagarah airport just before 11am today, when it clipped a tree, flipped and nose-dived into a creek.

His instructor, a 54-year-old Cudgera man, managed to release himself from the wreckage and alert emergency services.

Police from Tweed-Byron Local Area Command, NSW Ambulance paramedics, NSW Fire Brigades personnel attended the scene.

Rescue crews stabilised the aircraft to allow the trainee pilot to be freed.

He was airlifted by the Westpac Lifesaver helicopter to Lismore Base Hospital with back, chest and leg injuries.

The instructor suffered lower back and chest injuries in the crash and was treated at the scene by paramedics before being taken by ambulance to The Tweed Hospital.

Local police and officials from the Australian Transport Safety Bureau are investigating the incident.