A polymer sample analyzer, comprising: a gas phase component production unit for producing a plurality of gas phase components; an atmospheric gas introduction unit for introducing a predetermined atmospheric gas into the gas phase component production unit; a carrier gas introduction unit for introducing a carrier gas into the gas phase component production unit; a separation unit for separating the gas phase components introduced therein via a sample introduction portion into each of the components; a detection unit for detecting the each component separated by the separation unit; a gas phase concentrator for concentrating the gas phase components on the side of the sample introduction portion of the separation unit; and a gas phase component cooling unit for cooling the gas phase components at the gas phase component concentrator, wherein the gas phase component production unit comprises, inside thereof, a silica tube for inserting a sample vessel, the lower portion of the silica tube being connected to the sample introduction portion, a UV irradiation unit for irradiating the polymer sample with UV rays, the UV irradiation unit being equipped with a lamp as a light source, an optical filter for selectively transmitting ultraviolet light having a wavelength of 400 nm or less from lights irradiated from the light source and an optical fiber connected to the optical filter, wherein a tip portion of the optical fiber is inserted from the upper end portion of the silica tube in order to irradiate UV rays to the polymer sample in the sample vessel, and a gas switching unit for switching a gas to be introduced into the separation unit from the atmospheric gas to the carrier gas to introduce the gas phase components into the separation unit by the aid of the carrier gas after the deterioration and decomposition of the polymer sample, and the polymer material is, under the atmosphere of the predetermined atmospheric gas introduced from the atmospheric gas introduction unit, exposed to UV rays irradiated from the UV irradiation unit to cause deterioration and decomposition of the material, thereby forming a plurality of gas phase components. a gas phase component production unit for producing a plurality of gas phase components; an atmospheric gas introduction unit for introducing a predetermined atmospheric gas into the gas phase component production unit; a carrier gas introduction unit for introducing a carrier gas into the gas phase component production unit; a separation unit for separating the gas phase components introduced therein via a sample introduction portion into each of the components; a detection unit for detecting the each component separated by the separation unit; a gas phase concentrator for concentrating the gas phase components on the side of the sample introduction portion of the separation unit; and a gas phase component cooling unit for cooling the gas phase components at the gas phase component concentrator, wherein the gas phase component production unit comprises, inside thereof, a silica tube for inserting a sample vessel, the lower portion of the silica tube being connected to the sample introduction portion, a UV irradiation unit for irradiating the polymer sample with UV rays, the UV irradiation unit being equipped with a lamp as a light source, an optical filter for selectively transmitting ultraviolet light having a wavelength of 400 nm or less from lights irradiated from the light source and an optical fiber connected to the optical filter, wherein a tip portion of the optical fiber is inserted from the upper end portion of the silica tube in order to irradiate UV rays to the polymer sample in the sample vessel, and a gas switching unit for switching a gas to be introduced into the separation unit from the atmospheric gas to the carrier gas to introduce the gas phase components into the separation unit by the aid of the carrier gas after the deterioration and decomposition of the polymer sample, and the polymer material is, under the atmosphere of the predetermined atmospheric gas introduced from the atmospheric gas introduction unit, exposed to UV rays irradiated from the UV irradiation unit to cause deterioration and decomposition of the material, thereby forming a plurality of gas phase components.