Aircraft seat with single-beam structure and aircraft comprising such a seat

The seat has beam guides (5) located in a rear portion of the seat and oriented along a direction (Z1) perpendicular to a floor (100) of an aircraft cabin. The beam guides are fixed at a bucket seat (1) interdependent of a structure of connection of the beam guides with the floor. The bucket seat is secured at a back side (3) of the seat, where the connection structure comprises four attachment points (110a, 110b) that are arranged on two lines on the floor. The lines are parallel to a longitudinal direction (X) and arranged at a distance from a vertical symmetry plane of the seat.