PURPOSE: The titled cured epoxy resin, excellent in flexing resistance and brittle resistance at low temperature, and suitable as a floor material and a lining material, which comprises a liquid epoxy resin, a specified liquid chloroprene polymer, a reactive diluent and a curing agent for an epoxy resin.

CONSTITUTION: (A) 100pts.wt. of a bisphenol-type liquid epoxy resin of epoxy equivalent 100W1,000 are compounded with (B) 20W100pts.wt. of a liquid chloroprene polymer, having at least one hydroxyl group and at least one epoxy group in the malecule and having Brookfield viscosity of 3,000W30,000cps at 25°C, (C) 30W140pts.wt. of a reactive diluent of Brookfield viscosity 30W500cps at 25°C, having an epoxy or amino group at the both terminal groups and having a main chain of polypropylene oxide structure, and (D) a curing agent for an epoxy resin, and the resulting compound is cured at 0W200°C.