Abstract: Provided is a leakage detecting apparatus that installs a detection pipeline for detecting a leakage on a pipe through which a liquid flows and determines whether liquid leaks from the pipe based on a voltage change of the detection pipeline there is provided a leakage detection apparatus for detecting whether a leakage has occurred by using a detection pipeline including a plurality of wires, the leakage detection apparatus including: the detection pipeline including first through third electric wires in which end portions of the first and second electric wires are electrically connected through a diode; a pipeline measuring unit, after a constant current is applied to the first electric wire, measuring a pipeline voltage at specific point of place of each of the second and third electric wires; and a microprocessor determining whether the leakage has occurred based on the pipeline voltage of each of the second and third electric wires.