Dual Lower Rail Structure for Opposite Sliding Doors

A dual lower rail structure for opposite sliding doors is provided. The dual lower rail structure includes a first lower rail mounted in a longitudinal direction at a lower side of a vehicle body, a second lower rail mounted in a longitudinal direction on a vehicle body at one side of the first lower rail, a first lower rail roller unit rollably connected to the first lower rail, a second lower rail roller unit having one end rollably connected to the second lower rail, and the other end connected to a sliding door, and a lower rail swing arm rotatably connected to the first lower rail roller unit and the sliding door.