In order to stably detect biological information such as the heartbeat, respiration, and pulse waves of a living organism, a biological information detection system that detects biological information comprises: a transmission antenna arranged on one side of the living organism and irradiating radio waves of prescribed polarized waves on to the living organism； a reception antenna arranged on the other side of the living organism and receiving transmitted waves being polarized waves orthogonal to the radio waves of prescribed polarized waves in a step in which same are transmitted through the living organism； and a detection unit that detects biological information on the basis of the transmitted waves received by the reception antenna.
