Patent ID: 7198754

Claim:
A biological material detection apparatus which detects a charged biological material contained in a sample liquid, comprising: a biological material detection element having a substrate and a plurality of electrodes which are arrayed at predetermined intervals along a circumferential direction on the substrate and to which ligands that react with predetermined biological materials are respectively immobilized; a sample liquid introduction part to introduce the sample liquid to a central portion of the array of the electrodes on the substrate; a sample liquid moving mechanism to move the sample liquid introduced to the central portion on the substrate by the sample liquid introduction part radially toward the electrodes by an electrostatic attracting force produced by the electrodes; and a control device configured to control a process which is performed repeatedly, the process including (a) supplying an intercalating agent onto the biological material detection element, (b) measuring an electrochemical signal from the intercalating agent which is based on a reaction between the charged biological material and the ligand, and (c) removing the intercalating agent adhering to the ligand.