This research aims to synthesize MoS2 thin film for the hydrogen evolution reaction (HER) by the electrochemical way. We investigated various electrochemical conditions, including the pH of electrolyte, the applied current density, and electrolysis time to find optimal synthesis mode. The obtained samples were characterized by scanning electron microscopy (SEM) images and X-ray diffraction (XRD) patterns to determine the morphology and crystal structure. The polarization curve confirmed the HER activity of MoS2 thin film. The results indicated that the synthesized MoS2 film had a perfect catalytic activity, as shown by the overpotential value at 10 mA/cm2 and Tafel slope reached 144 mV and 56.2 mV/dec, respectively.