A Waihi Beach man is in Auckland's Middlemore Hospital after injuring his neck while playing on a bouncy castle.

The Tauranga based Trustpower TECT Rescue Helicopter was called to Waihi Beach about 3pm on Sunday after the 45-year-old man fell.

The Tauranga based Trustpower TECT Rescue helicopter. Photo: File.

Trustpower TECT Rescue Helicopter pilot Todd Dunham says the man suffered a serious neck injury.

The man was treated at the scene by St John paramedics before being flown to Middlemore Hospital for further treatment.

Todd says the helicopter was called due to the injury which required minimal movement and the distance to the Auckland hospital.