Tailgate Hinge Mounting Structure

An embodiment is tailgate hinge mounting structure including a roof rail disposed in the width direction of the vehicle body, the roof rail comprising a rail reinforcement configured to protrude to the inside thereof, a rear end module connected with the roof rail, the rear end module including a rear end protrude portion configured to be inserted into the rail reinforcement, a tailgate hinge connected with the roof rail and the rear end module, and a rail bolt connecting the rail reinforcement and the rear end protrude portion.