A wiper system for motor vehicles may include a crank arm configured to be rotated by a wiper driving motor, a first link member connected to a first end of the crank arm to be linked with the crank arm, a third link member connected through a first hinge to be linked with the first link member and a second link member of which a first end is connected to the third link member through a second hinge, a lever member in which a first end is pivotably connected to a third hinge provided at a second end of the second link member and a driver's seat wiper arm mounting support shaft is pivotably provided at a second end, and a support shaft for mounting a passenger's seat wiper arm provided at a first end of the third link member of which one end is connected to the first hinge.