This paper deals with active wave control of a flexible beam using a wave filter constructed with smart sensors. It is the purpose of this paper to present a novel wave filtering method using PVDF film sensor and its application for adaptive feedforward control system. Firstly, the design procedure of the wave filter using shaped PVDF sensors is presented. When introducing PVDF sensor, shaping function is defined as a complex function. In this case, multiplying an imaginary unit is equivalent to making the phase difference of 90 degree. Next, from a viewpoint of numerical analysis, the accuracy of the wave filter and the performance of the control system is clarified. Finally, an experiment of the active wave feedforward control system is carried out, demonstrating the validity of the proposed method.