To provide a towing device for a working vehicle which tows a slave vehicle, with one end part of the towing device fitted to the center of a running body of the working vehicle having an endless track undercarriage, can minimize the shifting of the relative position between the working vehicle and the slave vehicle to nearly zero in turning, and is extremely small in giving shocks or vibration to the slave working vehicle when the running body is turned, thereby preventing even a high slave vehicle from being over-tuned and in which both the centers of a hopper and a chute are made to coincide with each other all the time, and to provide its towing method.

In the towing device for a working vehicle, one end part of a towing member mounted on the center of the running body of the working vehicle having an endless track via a boll joint movably vertically and horizontally, and the other end part is mounted on the front center of the slave working vehicle movably horizontally.