Abstract: A portable dance floor formed from the interconnection and interlocking of multiple dance sections each of which dance sections is formed from a dance substrate generally of plywood, wherein each dance section is supported off the ground. Dance sections interlock at the junction of four such sections, on the underside thereof into a main connector plate, and which sections interconnect along the interfacing sides of any two abutting sections by a spline disposed in a slot formed of aligned half slots. Transition members having an inclined plane to ease the change in elevation may be provided and may be interconnected in a similar manner to adjacent dance sections.