A seat for a passenger cabin of a vehicle includes a bucket seat (10), the bucket seat including a seat pan (11) and a back rest (12) attached to the seat pan with which it determines a dihedron with a constant angle, integral with a base (20). The bucket seat is mobile, between a sitting position “a,” in which the seat pan (11) is approximately horizontal, and a resting position “r,” in which the back rest (12) is pivoted rearward by an angle  relative to the sitting position “a,” in rotation relative to the base around an axis of rotation (21), approximately fixed relative to the base, located above the seat pan (11) and in front of the back rest (12) when the bucket seat is in the sitting position “a.” The pivoting axis is defined by, for example, the shape of slides on which rollers or shoes travel.