The invention relates to a passenger seat unit for a means of transport with at least two classes of comfort, particularly a passenger seat unit for an aircraft, comprising a conversion unit (20) intended for converting from a first configuration of class of comfort to a second configuration of class of comfort, the conversion unit (20) comprising at least one conversion means (50) and one guide unit (46) intended to guide the conversion means (50) in a movement relative to a backrest unit (28) during a conversion operation. It is proposed for the guide unit (46) to be designed to guide the conversion means (50) in such a way that it effects a translational movement relative to the backrest unit (28).
