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A dark pulse mode-locked laser is experimentally demonstrated using the indium tin oxide (ITO) coated D-shape fiber as a saturable absorber (SA).Using the polishing wheel technique,a D-shape single mode fiber was fabricated.A 60-nm-thick layer of ITO was deposited over the D-shape fiber using the electron beam deposition method.The SA has a saturation intensity of 40.32 MW/cm2 and a modulation depth of 3.5％.A stable dark pulse mode-locked laser was observed at a central wavelength of 1559.4nm with repetition rate 0.98 MHz,pulse width 370ns and signal-to-noise ratio 61 dB.