<p>The marking apparatus performs marking on a covering portion of an electric wire 100 and is provided with an ink tank 10 storing dye ink, a felt portion 20 guiding the dye ink inside the ink tank 10, and a plurality of stamp portions 30 holding the dye ink supplied from the ink tank 10 through the felt portion 20 and interposing and stamping a covering portion of the electric wire 100. The stamp portions 30 are configured by porous material. Further, the dye ink has a viscosity of from 1.0 mPa.s to 10000 mPa.s.</p>
