Resin composition and molded article thereof

A resin composition comprising:

• a thermoplastic resin (A), a polyrotaxane (B) whose cyclic molecule is modified with a graft chain having a reactive functional group at the end, a fibrous filler (C), and an elastomer (D), which are mixed together,
• wherein the thermoplastic resin (A) is a resin selected from a polyamide resin, a styrene-based resin, a polycarbonate resin, a polyester resin or a polyarylene sulfide resin, the reactive functional group at the end of the graft chain of the polyrotaxane (B) is at least one group selected from a hydroxyl group, an amino group, a carboxyl group, an acid anhydride group, a glycidyl group, an isocyanate group, an isothiocyanate group, a thiol group, an oxazoline group and a sulfonic acid group, and
• the resin composition containing the fibrous filler (C) in an amount of 1 to 200 parts by weight relative to 100 parts by weight of a total amount of the thermoplastic resin (A) and the polyrotaxane (B),
• wherein, when a test piece in conformity with ISO178:2010 is formed using the resin composition and bending properties of the test piece are measured by the method in conformity with ISO178:2010, an elastic modulus is 3 GPa or more and the test piece causes no fracture even after exceeding its yield point.