The present invention provides a detection apparatus, including: signal outputting means configured to output signals of a frequency band within which the difference in electric characteristic between different tissues of a living organism is higher than a predetermined level individually to two or more electrodes impedance detection means configured to detect, from each of the electrodes, an impedance of the living organism disposed in quasi-electrostatic fields generated individually from the electrodes in response to the outputs and colloid detection means configured to detect presence or absence of colloid in the inside of the living organism in response to the differences between the detected impedances.
