To provide a weighing device for chassis dynamometer facilitating weighing work and efficiently improving weighing accuracy.

The device comprises a weighing arm 120 extended and horizontally arranged to the radial direction of a roller 110, a weighing anchor 300 providing a measuring device 130 with weighing loads via the weighing arm 120, and a shifting means shifting the weighing anchor 300 along the weighing arm 120. This enables weighing loads on the measuring device 130 to be variable depending on the position of the weighing anchor 300.