Vinylidene fluoride resin film and metallized film thereof

A vinylidene fluoride resin film comprising a homopolymer or copolymer of vinylidene fluoride having an inherent viscosity of 0.8 to 1.8 dl/g as measured in dimethylformamide at a concentration of 0.4 g/dl at 30.degree. C., said vinylidene fluoride resin film having the characteristics (1) to (3) shown below:

• (1) a crystal melting point giving a heat absorption peak of from 182.degree. C. to about 196.degree. C. as measured by a differential scanning calorimeter in a nitrogen atmosphere at a temperature elevation speed of 10.degree. C./min.;
• (2) a diffraction point corresponding to (1 1 .zeta.) of the .alpha.-phase crystal at a wide angle X-ray diffraction photograph;
• and
• (3) an orientation degree of the crystal of from 0.85 to about 0.94 when measured under irradiation of X-ray incident vertically on a major surface of the film.