In an electric hand, a cam member 12 mounted to a drive shaft 3a of an electric motor 3 is provided with a pair of cam grooves 15 and 15, a pair of jaw members 2 and 2 for grasping a workpiece are provided with drive pins 13 fitted to the cam grooves 15 and 15, and a normal or reverse rotation motion of the drive shaft 3a is converted into an opening or closing motion of the jaw members 2 and 2 by the cam member 12 and the drive pins 13. A torque limiter 6 having a friction plate 19 for connecting by a frictional force the drive shaft 3a of the electric motor 3 and the cam member 12 is provided between the drive shaft 3a and the cam member 12, and a torque of the drive shaft 3a transmitted to the cam member 12 is limited by this torque limiter 6.