A seating unit for an aircraft including at least one seat and a pivoting device for pivoting the seat around a vertical axis, wherein each seat includes: a plate on which the seat is pivotably assembled; a platform configured to fasten onto rails for accommodating the seat; a translatory movement device for a translatory movement of the plate in relation to the platform along a horizontal direction; and an immobilization device for immobilizing the plate relative to the platform in the translatory movement of the plate, and immobilizing the seat in relation to the plate in a rotary movement of the seat.