Emergency workers say the Westpac Life Saver Rescue Helicopter was called to South Murwillumbah late Sunday night after a man fell down a storm water drain.
The man in his 40s was reportedly trying to avoid being hit by a car when he fell and was trapped for some time with his left leg stuck in the drain from the pelvis down.
Rescue workers came around 11.00 pm and were able to free him some time later using heavy equipment.
Helicopter medical staff treated the man on scene before he was taken to the Tweed Heads District Hospital in an ambulance.
It is believed the man is now in a stable condition.