A swivel cable connector mounting structure includes a device housing having a through hole at a peripheral wall thereof, a rotary connector including a cylindrical base rotatably inserted through the through hole, two metal pivot rods affixed to an outer coupling end of the cylindrical base outside the device housing and two metal conducting terminals embedded in an inner end of the cylindrical base and respectively connected to the two metal pivot rods, a spring member mounted around the rotary connector and stopped between the peripheral wall of the device housing and a part of the cylindrical base of the rotary connector, a swivel connector including a U-shaped base pivotally coupled to the two metal pivot rods and two metal conductors embedded in the U-shaped base and kept in positive contact with the two metal pivot rods, and an electrical cable electrically connected to the two metal conductors.