A direct pressure type mold clamping apparatus for an injection-molding machine is capable of performing high speed mold closing and opening operations and of producing a required mold clamping force, without the use of a large sized motor, the mold clamping apparatus being driven by two motors. A movable platen is driven by servomotor at high speed to a die touch position. An error register of a servo circuit is supplied with distributed pulses which correspond to a moving amount from the die touch position to a set mold clamping force producing position. The movable platen is then driven in a mold clamping direction with a greater driving force by an induction motor. Thereafter, pulse signals outputted by a position detector are supplied to the error register corresponding to movement of the movable platen to gradually reduce an error value of the error register. When the error register value is reduced to zero, arrival at the set mold clamping force producing position is determined. Then, the induction motor is braked by a braking system so that the required mold clamping force is produced. Thereafter, the movable platen is driven by the servomotor at high speed in the mold opening direction.