A damper dial for a vehicle air vent has a dial body, a first dial bush, a second dial bush, an O-ring, and a dial fixture. A hinge hole is formed to penetrate a center portion of the dial body. A dial is formed on a front surface portion of the dial body. A hinge protrusion protrudes from one side surface of the first dial bush. A support pin extends from a distal end portion of the hinge protrusion. An insertion groove is inwardly formed on one surface of the second dial bush. An annular groove is formed outside the insertion groove. The O-ring installed so that an outer surface of the O-ring makes contact with one side surface of the dial body. An assembling hole is perforated and formed in the dial fixture.