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Recently, an increasing attention has been paid to methods using electric field to control the physical properties and meso-scale structures of soft materials such as polymeric liquids (polymer blends, block copolymers), colloid dispersion systems, liquid crystals, surfactant solutions and vesicles. Among others, the changes of rheological properties, what is called, electro-rheological (ER) effect, have been intensively investigated for binary liquid blends and particle dispersion systems, and such electro-active fluids have been attempted to use as clutches of vehicle, the active dumper and brake, and so forth. It has been reported that, in an immiscible liquid blend, droplets dispersed in matrix are aligned along the direction of electric field and bridge between two electrodes, which is the origin of ER effect. Namely, the change of rheological properties in such fluids comes from a change of a mesoscale structure by electric field. On the other hand, there is another research trend to utilize or to control the structures themselves by applying an electric field in order to obtain a new functional material. Actually, the bridges observed in dielectric liquid blends can be applied to thermoplastic blend systems to develop new materials whose mesoscopic structures are controlled by the electric field. For instance, after obtaining solid columnar structures, such materials can be applied to create a porous medium and fibers with a controlled length by dissolving a matrix part and columnar part, respectively. We can also create elastically anisotropic materials by using a tough material for the columnar part. It has also been reported that the orientation of a mesophase such a lamellar or cylinder structure of block copolymer melt can be controlled by applying electric field. For instance, an orientation of cylinder structure can be aligned along the direction of applied electric field. As other applications, there are fabrications 13) of nano-scale fiber using electric field, what we call, electro-spinning of polymer solutions and melts. Making of fibers and cylindrical objects has also been tried using patterned electrodes. Steiner group has reported that a pattern prepared on the one side of sheet-like electrode can be transferred to a polymeric material by applying electric field as shown in Fig. 1. In their system, one of two sheetlike electrodes has a periodically aligned uneven surface pattern, the other electrode is a flat sheet. A sample is between two sheet-like electrodes, and put on the flat sheet. In the present paper we are addressing to develop a simpler method to control the surface pattern of liquid material without uneven surface patterns of electrodes. We used a Electric Field Induced Surface Profile Change of Liquid Film on a Periodically Aligned Electrode Array