A vehicle curtain airbag device is provided including: a curtain airbag including a main chamber that inflates and deploys to a vehicle width direction inside of a driving-seat-side side window due to being supplied with gas from an inflator installed to a vehicle, a delay chamber that is provided at a vehicle front-rear direction front side of the main chamber, and that completes inflation and deployment later than the main chamber upon receipt of the gas supply, and a sub chamber that is disposed on the vehicle width direction inside of the main chamber and that inflates and deploys so as to block off a gap formed between the main chamber and a driver's seat airbag that is inflated and deployed from a steering wheel; and a controller that inflates and deploys the driver's seat airbag and actuates the inflator in the event of a small overlap collision.