To provide a vinyl chloride resin paste sol that can form an open-cell foam product made of vinyl chloride when used in the production of a foam product made of a vinyl chloride resin and can produce a foam made of a vinyl chloride resin excellent in resilience.

The vinyl chloride resin paste sol comprises a vinyl chloride resin, a plasticizer, a zinc carboxylate, a partial esterification product of a condensation product of a carboxylic acid and a chemical foaming agent. More specifically, the vinyl chloride resin paste sol comprises 30-120 pts.wt. plasticizer, 0.01-5 pts.wt. zinc carboxylate, 0.1-10 pts.wt. partial esterification product of a condensation product of a carboxylic acid and 0.1-8 pts.wt. chemical foaming agent, each based on 100 pts.wt. vinyl chloride resin.