TORQUE GENERATING DEVICE

[Object] To provide a torque generating device that uses a magnetic viscous fluid and that is suitable for miniaturization and able to obtain large shear stress.[Solution] The torque generating device includes a magnetic disk configured to rotate around a rotation axis, a first yoke located on one side and a second yoke located on an other side across the magnetic disk, a coil disposed so as to overlap the magnetic disk when viewed along a direction in which the rotation axis extends, a third yoke of which at least a region proximity to the magnetic disk is located on an outer side of the magnetic disk and the coil and that makes up a magnetic path of a magnetic field that is generated by the coil in cooperation with the first yoke and the second yoke, and a magnetic viscous fluid filled between the magnetic disk and each of the first yoke and the second yoke. The third yoke has a magnetic gap between the third yoke and the first yoke. The magnetic gap is formed at a position on an outer side of an outer peripheral edge of the magnetic disk or a position that overlaps the outer peripheral edge of the magnetic disk when viewed in the direction along the direction in which the rotation axis extends.