A waterproof cable connector has a body, two plugs and at least one sealing ring. The body has a chamber and two through holes communicating with the chamber. The plugs are respectively connected to the body via the through holes and each plug has a clamping ring and a securing fastener. The clamping ring is mounted in the body and has multiple grooves and multiple tabs. The securing fastener is mounted around the clamping ring to press the tabs of the clamping ring. The at least one sealing ring is elastic and waterproof and is mounted between separate parts on the body to prevent water from permeating the chamber of the body.