The invention relates to a seat arrangement, in particular designed to be installed in an airplane cabin, comprising: at least one “front” seat and at least one “rear” seat, positioned one behind the other along a longitudinal axis of the airplane cabin and comprising respectively at least one seat that can pass from a “seating” position to a “bunk” position, a transverse passage arranged between the “front” seat and the “rear” seat to allow access to an aisle, characterized in that the seat arrangement comprises movable closure means that can at least partially close off the transverse passage when the closure means are deployed.