To provide a motor device capable of generating high torque and to provide a robot device.

The driving device and robot device, includes: a rotor; a transmission part containing an anisotropic material, suspended on at least part of a peripheral surface of the rotor; and a driving unit that moves the transmission part by a fixed distance while making a span between the rotor and the transmission part in a state where torque is transmitted and return the transmission part to a predetermined position in a state where the state where torque is transmitted is canceled.