PROBLEM TO BE SOLVED: To readily recover various kinds of minute biomolecules to be recovered contained in a sample solution by separating these biomolecules according to dimension of affinity for various probe molecules.;SOLUTION: A sample solution 8 containing biomolecules 7 to be recovered is poured into a microchannel array 6. After the biomolecules 7 are bound to probe molecules which are fixed on the wall of a microchannel in the form of spots and which have a high affinity for the biomolecules 7, a second substrate having periodic protrusions is removed from the microchannel array 6. A portion of the microchannel array 6 that includes a spot in which the probe molecules that are bound to the biomolecules 7, which are the objects to be recovered for the first substrate, are fixed is cut with a sharp cutting knife, for example, thereby obtaining a piece that retains on the surface the probe molecules that are bound to the biomolecules 7.;COPYRIGHT: (C)2005,JPO&NCIPI
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