To numerically express the cutting strength of a wrapping film as an objective evaluation criteria, by pulling out wrapping film out of a wapping film carton fixed in a rotary part and fixing to a measuring part with a fastening tool and rotating the wrapping film to the peripheral direction.

A corton 8 for wapping film is inserted in a holder 1 and fixed by a stopper 2. Then the wapping film 9 is pulled out of the carton 8 and the end thereof is held by a fastening tool 4 and fixed thereto. Then the wrapping film 9 is pulled by a tension-adjusting handle 6 of the wrapping film to decide an initial position. After the adjustment, a starting button 7 for measurement is pushed on. Then a rotary actuator 3 and also the holder 1 start to rotate and the wrapping film 9 is cut by a V-shaped cutter blade fitted to the carton 8 for the wrapping film 9. The maximum tensile force at that time is measured by a gauge 5.