Abstract: An aircraft seat includes a hollow seat structure that is made from a single layer of a reinforced composite material. In a unitary construction, the seat structure has a seat portion and a backrest, and it is formed with a convex surface that is located under the seat portion. A base frame formed with a concave surface is attached to the aircraft fuselage, and it is oriented for juxtaposition with the convex surface of the seat structure to provide for a relative sliding motion of the seat structure on the base frame. A connector is also provided for selectively holding the convex surface of the seat structure in a fixed orientation relative to the concave surface of the base frame.