To obtain a tubular film further improved in the stability against bubbles on the production of the film, prevented in the generation of wrinkles, excellent in transparency and useful as a film for wrapping foods, etc., by compounding a polyamide resin with a phosphorous processing stabilizer in a specific ratio.

(A) A polyamide resin (e.g. polyamide-6, polyamide-66) having a number-average mol.wt. of ≥2,000 is compounded with (B) a phosphorous processing stabilizer [e.g. tris(2,4-di-t-butylphenyl)phosphite] in an amount of 0.01-3wt.% based on the whole amount of the composition. For example, the components A and B may be dry-blended, or the dry-blended product may further be heated and kneaded with an extruder to compound the component B with the component A.