An object of the invention is to provide a structure for an aircraft seat section is configured to be able to have an appropriate impact absorbing stroke in an aircraft having a small interior space. The structure is provided with a survival tub (1) which is an occupant protection member for surrounding from the lower side of the aircraft body, the space for an occupant (51) which includes a seat (50) on which the occupant sits. Preferably, the survival tub (1) is held by link mechanisms (4, 5) and an impact absorption operation section (9) so that during impact, the survival tub (1) can move to the upper side of the aircraft body.