PROBLEM TO BE SOLVED: To provide a wheel load control device for railway rolling stock capable of realizing an increase of a wheel adhesion coefficient and reduction of derailment coefficients without causing damage of a rail top surface.
SOLUTION: A balance beam 22 made of a non-magnetic material is mounted between front and rear axle boxes 18 of a bogie 11. At the center part of the balance beam 22, an electromagnet 21 is arranged via a supporting member 24. A gap t1 exists between an upper end face 24a of an inner hole of the supporting member 24 and an upper surface of the balance beam 22 in a state of the electromagnet 21 pulled up by a spring 23 at a non-energizing time. The gap t1 is smaller than a gap t2 between a lower end face 21a of the electromagnet 21 and the rail top surface 100a at the non-energizing time. When suction force is generated between the electromagnet 21 and a rail 100 at an energizing time, the supporting member 24 hits on the balance beam 22, and both end parts 22b and 22c of the balance beam 22 lower the axle boxes 18. This power is added to wheel load of the wheel 15 to increase an apparent adhesion coefficient to the rail 100 of the wheel 15.