1. A thermoplastic resin composition for refrigerant transporting piping, wherein the thermoplastic resin composition comprises a matrix containing a thermoplastic resin, and a rubber-containing domain dispersed in the matrix; the thermoplastic resin has a melting point of not less than 150° C.; the rubber is a butyl-based rubber or olefin-based rubber; the matrix contains 5% to 30% by weight of a viscosity stabilizer; the thermoplastic resin composition comprises at least one selected from the group consisting of a phenylenediamine-based antioxidant, quinoline-based antioxidant, and trihydric alcohol having a triazine skeleton, and a processing aid; and at least part of the rubber is cross-linked.
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