NHTSA released the Standard FMVSS No. 226 final rule in January 2011 for the protection of passenger from ejection through side windows during rollovers or side impact events. However there is no safety device to protecting the occupants from the roof ejection. Furthermore, the sunroof market size is increasing every year. For these reasons, the ejection to the roof is exposed to great danger. Therefore, in this study, the panoramic sunroof airbag was developed for the passenger protection from the ejection. Based on a vehicle rollover behaviour, the TTF and deployment times were derived. And the cushion structure was designed to prevent the ejection of passengers from a confined space within the roof.