Patent ID: 8637326

Claim:
A biological substance analyzing method that employs a biological substance analyzing cell equipped with a reaction chamber having a sample supply space, an acoustic matching layer which is provided at a predetermined region of an inner wall of the reaction chamber that faces another inner wall, and a sensor portion provided on a surface of the acoustic matching layer toward the side of the sample supply space, on the surface of which an immobilized binding substance that specifically binds with the detection target substance is immobilized, comprising: supplying a liquid sample that includes a detection target substance into the sample supply space; emitting ultrasonic waves such that a standing wave having a node positioned at the interface between the acoustic matching layer and the sample supply space is generated between the acoustic matching layer and the other inner wall of the reaction chamber; concentrating the detection target substance at the interface by the capturing forces that operate in the direction of the nodes; and detecting the concentrated detection target substance with an immobilized binding substance, which is immobilized onto the sensor portion, that specifically binds with the detection target substance.