A hula hoop, comprising a hoop body which includes a plurality of unit sections connected end to end, two adjacent unit sections are detachably connected to each other through a connecting member, and each unit section has an accommodating groove for inserting the connecting member. The front section and the rear section of the connecting member are inserted into the accommodating grooves of two adjacent unit sections, and the unit section has a locking mechanism for keeping the connecting member in the accommodating groove. The hoop body comprises a plurality of unit sections connected end to end. Two adjacent unit sections are connected to each other through a connecting member, which can realize the rapid disassembly and assembly of the unit sections. By increasing or reducing the number of unit sections, the inner diameter of the hoop body can be changed to adapt to exercisers with different body shapes, and the hoop body can be opened at any position, which is more convenient to operate than the prior art.