An analysis system comprising: a sample individually transferring unit comprising a nebulizer (N) adapted to atomize an analysis sample (S), a spray chamber (C) adapted to select the atomized analysis sample based on a particle diameter, and a sample-transferring path adapted to online transfer the analysis sample from the spray chamber to a plasma torch (P); and a common analysis unit comprising the plasma torch adapted to supply the online-transferred analysis sample into plasma flames, and an analysis apparatus with inductively-coupled plasma or microwave plasma, wherein at least two sample individually transferring units are provided and each of the sample transferring paths of the sample individually transferring units is coupled to the plasma torch of the common analysis unit, each of the sample transferring paths has a main flow path adapted to transfer the analysis sample from the spray chamber to the plasma torch, a makeup gas supply path adapted to supply makeup gas to the main flow path, and a drain flow path interposed between the makeup gas supply path (M) and the spray chamber, the drain flow path (P) adapted to discharge makeup gas and the analysis sample from the main flow path, such that only makeup gas is supplied between the makeup gas supply path and a path end portion on the side of the plasma torch, the main flow path includes no pump and valve in a transferring path of the analysis sample, the plasma torch has a sample introducing pipe adapted to introduce the atomized analysis sample, and the inner diameter D d of the drain flow path is equivalent to or larger than the inner diameter D t of the sample introducing pipe of the plasma torch near the side of plasma introduction. a sample individually transferring unit comprising a nebulizer (N) adapted to atomize an analysis sample (S), a spray chamber (C) adapted to select the atomized analysis sample based on a particle diameter, and a sample-transferring path adapted to online transfer the analysis sample from the spray chamber to a plasma torch (P); and a common analysis unit comprising the plasma torch adapted to supply the online-transferred analysis sample into plasma flames, and an analysis apparatus with inductively-coupled plasma or microwave plasma, wherein at least two sample individually transferring units are provided and each of the sample transferring paths of the sample individually transferring units is coupled to the plasma torch of the common analysis unit, each of the sample transferring paths has a main flow path adapted to transfer the analysis sample from the spray chamber to the plasma torch, a makeup gas supply path adapted to supply makeup gas to the main flow path, and a drain flow path interposed between the makeup gas supply path (M) and the spray chamber, the drain flow path (P) adapted to discharge makeup gas and the analysis sample from the main flow path, such that only makeup gas is supplied between the makeup gas supply path and a path end portion on the side of the plasma torch, the main flow path includes no pump and valve in a transferring path of the analysis sample, the plasma torch has a sample introducing pipe adapted to introduce the atomized analysis sample, and the inner diameter D d of the drain flow path is equivalent to or larger than the inner diameter D t of the sample introducing pipe of the plasma torch near the side of plasma introduction. <EOS>