To provide a polyphenylene sulfide film which maintains the heat resistance, frequency characteristics and mechanical characteristics of polyphenylene sulfide, has improved voltage resistance, hence has an improved capacitor production yield, and is suitable for producing highly reliable capacitors.

This polyphenylene sulfide film characterized by having a thermal adhesion-initiating temperature of ≤100°C. The polyphenylene sulfide film, wherein the thickness direction portion of the film substantially wholly comprises polyphenylene sulfide resin. The crystallinity of the surface layer portion of the polyphenylene sulfide film is different from the crystallinity of the inner layer portion, and at least one surface layer portion is more amorphous.