To reduce noises inside a railroad vehicle by inhibiting vibrations resulting from the imbalance of the driving system of a truck for the railroad vehicle.

Containers 42 and 42 filled with granules 41 are installed around the outer periphery of a link 30 connecting the connecting member 25 of a vehicle body 20 to a truck frame 11. Rotation and vibration generated from an electric motor 41 for travel, a reduction gear and the driving system of a shaft coupling are transmitted to the link 30. The energy of vibration generated in the link 30 is converted into the kinetic energy of the granules 41 by the collision between the granules 41 in the container 42 to reduce the vibration of the link 30. Therefore, propagation of the vibration to the vehicle body can be inhibited. The granules 41 may be put in the cylinder portion 31 of the link 30. A column 62 may be movably provided.