Curtain airbag device

Disclosed is a curtain airbag device which can protect the people in a car by preventing a front pillar trim from being deviated from a front pillar panel upon the deployment of a curtain airbag when the car crashes and attach a front pillar trim to a flexible curtain airbag back plate in which a curtain airbag is embedded by using a simple fixing means such as a screw, thereby providing a space enough to deploy the curtain airbag.