An arrangement of individual seats for passengers in an aircraft, comprising a plurality of seats (1) which can be converted into beds and disposed in rows (2), comprising two lateral groups (3a) of two contiguous rows, each group being disposed along a wall (4) of the aircraft fuselage, and two central groups (3b) each comprising two continuous rows. The central groups being up against one another laterally, and the central groups being separated from each of the lateral groups by a gangway. Each of the lateral and central groups comprising, between two consecutive groups in a first row, and a gap able to allow transverse passage (6) to a gangway (7) for the passengers in the second row when the corresponding seat in the first row is in the bed position.