Antistatic films are designed and manufactured so as to have proper electrification properties that are previously defined according to types and applications of the antistatic films on the basis of simulated outbreaks of static trouble such as static marks and/or static clinging of sample films having electrostatic charges (V) and surface resistivity (R) either one or both of which differ stepwise from one another that are expressed in R-V orthogonal coordinate diagrams.