The present invention relates to a film touch sensor in which a separation layer is formed on a carrier substrate prior to the formation procedures of the touch sensor, and a method of preparing the film touch sensor. The film touch sensor according to the present invention comprises a separation layer; an electrode pattern layer formed on the separation layer and comprising a sensing electrode and a pad electrode formed at one end of the sensing electrode; and an insulation layer formed on the electrode pattern layer and used as a base film layer.