A passenger seat arrangement for installation in an aircraft comprises a seat unit with a backrest element and a seat element. The seat arrangement also comprises a supporting frame carrying the seat unit and comprising at least one seat mounting, which has a first backrest holder, to which the backrest element can be releasably fixed in a load-transferring manner in a first position on the seat mounting, and a second backrest holder, to which the backrest element can be releasably fixed in a load-transferring manner in a second position on the seat mounting. When the passenger seat arrangement is installed in the aircraft, the backrest element is pivoted in relation to a longitudinal axis of the aircraft in a state in which it is fixed to the first backrest holder relative to a state in which it is fixed to the second backrest holder.