collection position of the second magnetic generation part 131 m thus the magnetic particles contained in the liquid sample inside the reaction vessel 3 a that have been preliminarily magnetically collected are magnetically and locally collected and held at a point in the main magnetic collection using strong magnetic forces produced at the end portions of each of the four magnets of the second magnetic generation part 131 m including the magnets 113 and 114 these two second magnetic generation parts 131 m arranged side by side can replace the second magnetic generation part 32 m that performs main magnetic collection on two reaction vessels 3 a at a time here the second magnetic generation part 32 m see fig7 according to the first embodiment may be replaced with two second magnetic generation parts 131 m instead of the configuration illustrated in fig2 one first magnetic generation part 131 p and one second magnetic generation part 131 m may be provided in this case each of the preliminary magnetic collection and the main magnetic collection is performed in one cycle which increases the analysis processing speed fig2 illustrates a first magnetic generation part according to a fourth embodiment in the fourth embodiment preliminary magnetic collection is performed on three reaction vessels 3 a at a time similarly to the first magnetic generation part 32 p according to the first embodiment a first magnetic generation part 133 p includes four magnets the way how the four magnets in the first magnetic generation part 133 p.