To contribute to lowering of a floor, similarly when a torque shaft is not used, by the extent that the torque shaft is slim, while preferentially securing rigidity and strength required for a bogie, by connecting right-left wheels of at least one of the front or rear by the slim torque shaft of a degree of satisfying the torque transmission.

The problem is solved so that side beams 5 and 6 are supported via axles 11-14, axle boxes 15-18 for bearing the axles and primary suspensions 21-24 by right-left four wheels 1-4 of the front and rear, a frame 26 having an integral connecting part 25 lower than the axles is provided between the side beams 5 and 6, and the mutual axles of right-left wheels 1 and 2 of at least one of the front and rear are connected by the torque shaft 27 of a degree of satisfying the torque transmission for integrally rotating the right-left wheels, and right-left mutual ones of the axle boxes 15-18 corresponding to the right-left wheels 1-4 of the front and rear are connected around a lower part of the wheels 1-4 by stab axles 29 and 31.