PURPOSE: The titled composition which can cure into a flexible film within a short time by irradiation with light, heating or the like, comprising a PVA resin of a block character above a specified value, a polymerizable vinyl compound and a polymerization initiator.

CONSTITUTION: A curable resin composition containing a PVA resin (A) of a block character [η] ≥0.55 (preferably, one having a block character ≥0.60, a degree of saponification of 30W95mol%, and a degree of polymerization of 200W2,000), a polymerizable vinyl compound (B) [e.g., hydroxyalkyl (meth) acrylate] and a polymerization initiator (C) (e.g., a benzoin compound). By using resin A having a block character ≥0.55, this composition can cure into a film rich in flexibility within a short time by irradiation with light or heating. This composition is useful for paints, adhesives, molding materials and printing board materials.