A design method for sliding-mode servomechanisms of type l is proposed. 'Type l' is achieved by extended sliding-mode control which realizes type l and a feedforward dynamic compensator of order l-1. The extended sliding-mode control theory is applied to an augmented system which is constructed by a given system and a dynamic compensator of order 1. The closed loop poles can arbitrarily be assigned by suitable design of the gains of the dynamic compensators and the coefficients of a sliding surface equation. The derived sliding-mode servomechanisms are invariant with respect to disturbances, parameter variations, and nonlinearity.