Emergency services were called to Summit Rd, Sumner, at 10.51am after reports a paraglider had been injured.
Hato Hone St John sent two ambulances, a rapid response vehicle and a helicopter to the scene.
"One patient in a critical condition is being airlifted to Christchurch Hospital," a St John spokesperson said.
Police said they were called to the incident about 11am.
"A person has fallen from a height while paragliding and is reported to be seriously injured," a police spokesperson said.
It is the second paragliding incident in the area over the past two weeks. Last Saturday, a paraglider was taken to hospital with moderate injuries after crashing in Sumner.