A flame-retardant curable resin composition which comprises (1) a polymerizable
vinyl monomer having a glass transition temperature of its homopolymer of at most
0 C., (2) a polymerization initiator, (3) a reducing agent and (4) a flame
retardant in an amount of from 25 to 75 parts by mass based on 100 parts by mass
of the total of (1) the polymerizable vinyl monomer having a glass transition temperature
of its homopolymer of at most 0 C., (2) the polymerization initiator and
(3) the reducing agent.
