A blending of a styrenic resin, and a flame retardant comprising a
phenolic resin and a phosphazene compound to a polyalkylene
arylate-series resin imparts flame retardancy to a polyalkylene
arylate-series resin. The phosphazene compound is a cyclic
phenoxyphosphazene compound, a linear phenoxyphosphazene compound, or a
crosslinked phenoxyphosphazene compound. The obtained polyalkylene
arylate-series resin composition has excellent heat resistance and high
flame-retardancy without bleeding out the flame retardant.