Vibration isolation structure applied between upper and lower seat frames for vehicle

A vibration isolation structure for isolating vibration in a seat, the vibration isolation structure comprising:

• a lower assembly configured to fix a lower portion of a seat frame and fastened to a vehicle body;
• an upper assembly configured to fix an upper portion of the seat frame;
• a plate located below and apart from the lower assembly;
• and
• a bearing unit located between the upper assembly and the lower assembly and between the lower assembly and the plate, and configured to include bearings configured to carry out rotary motion and translational motion in a horizontal direction in response to vibration transmitted to the lower assembly,
• wherein the upper assembly, the bearing unit, the lower assembly, and the plate are coupled through a fastener without an up-and-down play.