A roof headliner structure in which a curtain airbag for a vehicle is housed, includes the curtain airbag attached in a folded state along a roof side rail, a roof headliner, a pillar garnish including a clip seat, and a tether clip attached to the clip seat. The curtain airbag is covered from a vehicle cabin side with the roof headliner and the pillar garnish. The pillar garnish is attached to a pillar of the vehicle by the tether clip. The roof headliner has an extension portion extended so as to be positioned in the pillar garnish. The roof headliner is fitted at the extension portion to the clip seat.