A vaginal dilator for use in gynecologic examination. The vaginal dilator comprises an upper dilating member and a lower dilating member that are hinged to each other, the upper dilating member comprising an upper dilating leaf and an upper press rod arranged at a tail portion of the upper dilating leaf, the lower dilating member comprising a lower dilating leaf and a lower press rod arranged at a tail portion of the lower dilating leaf. The upper dilating leaf is hinged to the upper press rod, and the upper rod is hinged to the lower dilating member, and the upper press rod is provided with a light emitting element, a switch and a power source, the switch being connected with the light emitting element. The upper dilating leaf is pressed down to contact and mate with the upper press rod or the upper dilating leaf is disengaged from the upper press rod to coordinately control the switch to be connected to or disconnected from the power source.