To provide a polyvinylidene chloride resin composition excellent in a recrystallization rate and suitable for the production of a packaging film which requires transparency, mechanical characteristics, seal strength, gas barrier properties.

The polyvinylidene chloride resin composition is obtained by swelling with an epoxy additive such as epoxidized octyl stearate an organically modified layered silicate obtained by treating a layered silicate such as synthetic fluoromica with an organic onium salt and melt-kneading the swollen organically modified layered silicate with a polyvinylidene chloride resin.