A molded object having a non-woven fiber structure, the molded object comprising: a polyester-based fiber; and a binder, wherein the binder is a non-hygroscopic adhesive resin, wherein the non-hygroscopic adhesive resin has a weight change rate of less than 0.1% after keeping a constant temperature/constant humidity for 100 hours at a temperature of 85°C and relative humidity of 85%, wherein the molded object has apparent density of 0.5 g/cm 3 to 0.8 g/cm 3, wherein the molded object has a flexural strength change rate of less than 10% after keeping a constant temperature/constant humidity for 100 hours at a temperature of 85°C and relative humidity of 85%, wherein the molded object is manufactured by a dry method including a) preparing a non-woven fabric by mixing the polyester-based fiber and a sheath-core type bicomponent fiber including a core part of the polyester-based fiber and a sheath part that is the nonhygroscopic copolymer resin surrounding the core part, and then heating and pressurizing the result; b) installing the prepared non-woven fabric on a plurality of unwinding devices, and then moving to a heating press; and c) manufacturing a molded object by heating and pressurizing a plurality of the non-woven fabrics moved to the heating press under a temperature condition of 170°C to 210°C and a pressure condition of 1 MPa to 10 MPa. a polyester-based fiber; and a binder, wherein the binder is a non-hygroscopic adhesive resin, wherein the non-hygroscopic adhesive resin has a weight change rate of less than 0.1% after keeping a constant temperature/constant humidity for 100 hours at a temperature of 85°C and relative humidity of 85%, wherein the molded object has apparent density of 0.5 g/cm 3 to 0.8 g/cm 3, wherein the molded object has a flexural strength change rate of less than 10% after keeping a constant temperature/constant humidity for 100 hours at a temperature of 85°C and relative humidity of 85%, wherein the molded object is manufactured by a dry method including a) preparing a non-woven fabric by mixing the polyester-based fiber and a sheath-core type bicomponent fiber including a core part of the polyester-based fiber and a sheath part that is the nonhygroscopic copolymer resin surrounding the core part, and then heating and pressurizing the result; b) installing the prepared non-woven fabric on a plurality of unwinding devices, and then moving to a heating press; and c) manufacturing a molded object by heating and pressurizing a plurality of the non-woven fabrics moved to the heating press under a temperature condition of 170°C to 210°C and a pressure condition of 1 MPa to 10 MPa. a) preparing a non-woven fabric by mixing the polyester-based fiber and a sheath-core type bicomponent fiber including a core part of the polyester-based fiber and a sheath part that is the nonhygroscopic copolymer resin surrounding the core part, and then heating and pressurizing the result; b) installing the prepared non-woven fabric on a plurality of unwinding devices, and then moving to a heating press; and c) manufacturing a molded object by heating and pressurizing a plurality of the non-woven fabrics moved to the heating press under a temperature condition of 170°C to 210°C and a pressure condition of 1 MPa to 10 MPa.