Abstract: The invention describes a passenger seat unit for an aircraft cabin, comprising a seat surface (10), a backrest (20) and a leg rest (30), and having: an upright configuration in which the backrest (20) and the leg rest (30) are in a first position, and a bed configuration in which the backrest (20) and the leg rest (30) are in a second position, the backrest (20), the seat surface (10) and the leg rest (30) forming a substantially plane and continuous surface, characterised in that: the seat surface (10) is fixed, the backrest (20) is mounted mobile in rotation around a joint axis between the backrest and the seat surface (29), the leg rest (30) is mounted mobile in rotation around a joint axis between the leg rest and the seat surface (39).