A railway car includes a passenger compartment having, in a central segment of the compartment, a lower floor and an upper floor superposed with each other, respectively defining a lower story and an upper story, and, in end segments of the compartment, two platforms each connected to the lower floor through a descending passage and to an upper floor through an ascending passage. At least one platform is equipped with at least one row of longitudinal seats leaning against a side face of the railway car.