a passenger cabin of an aircraft includes a seat arrangement that includes a number of seat assemblies . the seat assemblies include a seat structure having a seat backrest forming a backrest surface the and a seat cushion element forming a seat surface , and a passenger space partition , which spatially partitions a passenger space of the seat and which at least partially surrounds the seat structure and leaves open an access to the seat structure . the seat cushion element is moveable between a comfort position , in which the seat cushion element projects further into the access in order to provide a larger seat surface , and an access position in which the seat cushion element does not project as far or does not project at all into the access in order to make possible a wider access .