<p>A liquid leakage detector line for detecting any leakage of a liquid such as sulfuric acid or strong alkali from a transportation pipe line or storage tank comprises a pair of wiry electrodes each including a conductor (2) covered with an insulating layer (4) made of a macromolecular material including an ester bond, the electrodes being disposed substantially in parallel with each other, and a liquid-absorbent material (3) covering these electrodes. The liquid-absorbent material (3) may be a braided body layer made of a liquid-absorbent yarn which is disposed outside of the pair of wiry electrodes, or may be a braided body layer disposed at the outer periphery of each of the wiry electrodes. If a sulfuric acid or alkali liquid leaks, the liquid-absorbent material (3) covering the electrodes will absorb such leakage liquid which will cause the insulator layers to dissolve to short-circuit the conductors (2). The insulation resistance between the conductors (2) is measured from one end of the detector line. The resultant decrease in the insulation resistance will be detected as a liquid leakage.</p>
