For the purpose of suppressing all the vibration modes of a distributed parameter structure, this paper proposes a novel active vibration control called cluster feedforward control consisting of both the cluster filtering method presented by the authors and a feedforward control method based upon a filtered-x LMS algorithm. First, this paper derives the optimal control law of the cluster feedfor- ward control, a numerical example based upon the control law for eliminating all the structural modes of a planar structure being shown. Experimental results show the capability for suppressing a single cluster, then all cluster of a planar structure, that leads to the suppression of all structural modes. Finally, comparing the conventional multiple SISO feedforward control with the cluster feedforward control, the superiority of the cluster feedforward control is discussed.