A slip control device, provided in an electric automobile including at least one electric motor unit configured to rotationally drive a drive wheel, for slip-controlling the electric automobile, the slip control device comprising: a driven wheel rotation frequency monitoring module configured to monitor a rotation frequency of a driven wheel; a maximum rotation frequency calculation module configured to calculate a current drive wheel maximum rotation frequency Nmax for the monitored current rotation frequency N1 of the driven wheel and a set ideal slip ratio λmin according to the following formula, Nmax − N 1 / N 1 = λ min; a drive wheel rotation frequency monitoring module configured to monitor a drive wheel rotation frequency N2 which is a rotation frequency of the drive wheel; a slip condition determination module configured to determine whether the monitored drive wheel rotation frequency N2 exceeds the drive wheel maximum rotation frequency Nmax; a torque cancellation module configured to make a torque command value to be zero if the slip condition determination module determines that the drive wheel rotation frequency N2 exceeds the drive wheel maximum rotation frequency Nmax, the torque command value being applied to the motor unit, the motor unit driving the drive wheel; a slip watch condition determination module configured to determine whether the drive wheel rotation frequency N2 exceeds a watch condition rotation frequency Nc which is set to a value lower than the drive wheel maximum rotation frequency Nmax if the slip condition determination module determines that the drive wheel rotation frequency N2 does not exceed the drive wheel maximum rotation frequency Nmax; and a torque reduction module configured to decrease the torque command value to the motor unit that drives the drive wheel if the slip watch condition determination module determines that the drive wheel rotation frequency N2 exceeds the watch condition rotation frequency Nc, wherein the torque reduction module calculates a difference between the drive wheel rotation frequency N2 and the drive wheel maximum rotation frequency Nmax, and decreases the torque command value as the difference decreases, and wherein according to a nonlinear curve which defines a relationship between the difference and a ratio of the torque command value to the motor unit relative to a torque command value from an accelerator, the torque reduction module decreases the torque command value as the difference decreases. a driven wheel rotation frequency monitoring module configured to monitor a rotation frequency of a driven wheel; a maximum rotation frequency calculation module configured to calculate a current drive wheel maximum rotation frequency Nmax for the monitored current rotation frequency N1 of the driven wheel and a set ideal slip ratio λmin according to the following formula, Nmax − N 1 / N 1 = λ min; a drive wheel rotation frequency monitoring module configured to monitor a drive wheel rotation frequency N2 which is a rotation frequency of the drive wheel; a slip condition determination module configured to determine whether the monitored drive wheel rotation frequency N2 exceeds the drive wheel maximum rotation frequency Nmax; a torque cancellation module configured to make a torque command value to be zero if the slip condition determination module determines that the drive wheel rotation frequency N2 exceeds the drive wheel maximum rotation frequency Nmax, the torque command value being applied to the motor unit, the motor unit driving the drive wheel; a slip watch condition determination module configured to determine whether the drive wheel rotation frequency N2 exceeds a watch condition rotation frequency Nc which is set to a value lower than the drive wheel maximum rotation frequency Nmax if the slip condition determination module determines that the drive wheel rotation frequency N2 does not exceed the drive wheel maximum rotation frequency Nmax; and a torque reduction module configured to decrease the torque command value to the motor unit that drives the drive wheel if the slip watch condition determination module determines that the drive wheel rotation frequency N2 exceeds the watch condition rotation frequency Nc, wherein the torque reduction module calculates a difference between the drive wheel rotation frequency N2 and the drive wheel maximum rotation frequency Nmax, and decreases the torque command value as the difference decreases, and wherein according to a nonlinear curve which defines a relationship between the difference and a ratio of the torque command value to the motor unit relative to a torque command value from an accelerator, the torque reduction module decreases the torque command value as the difference decreases.