An investigation has been launched after a 15-year-old girl and a 26-year-old woman were injured at Flamingo Land.
The pair were struck by a foot-rail which had become detached from a car on the Hero roller coaster ride as they stood in the queue.
The incident happened on Friday at around 3.30pm at the park in Kirby Misperton, near Malton.
A Flamingo Land spokeswoman said: “The ladies who were injured both sustained a cut to the head.
“They received medical attention at the park and the younger lady was taken to hospital by ambulance for further examination.
“The ride has been taken out of operation in accordance with our operational procedures and will be subject to a full inspection. The police and the Health and Safety Executive (HSE) have been informed and the company is fully cooperating with the ongoing investigation.”
A spokesman for North Yorkshire Police said: “A 26-year-old woman from Stockton and a 15-year-old girl from Nottinghamshire were taken to Scarborough Hospital for treatment for non-serious head injuries.
“The Health and Safety Executive is investigating the circumstances surrounding the incident.”
The £8m white-knuckle ride, which suspends revellers from a corkscrew platform, opened in 2013 and replaced the Wild Mouse.