In one form, a passenger airbag device is provided including an airbag; a retainer having an opening on a passenger side; a bag ring provided to an inside of the retainer; and the gas generating device; wherein: the retainer further includes a base wall that forms a substantially rectangular outer edge shape; two first peripheral wall portions; and two second peripheral wall portions; and the bag ring comprises: a bottom wall portion configured to hold a peripheral edge portion of the opening of the airbag; a first upright wall having a predetermined first height dimension, that is arranged so as to face the first peripheral wall portion of the retainer; and a second upright wall having a predetermined second height dimension larger than the first height dimension, that is arranged so as to face the second peripheral wall portion of the retainer.