Floating structure for coaxial connector

Provided is a floating structure of a coaxial connector having a floating function and ensuring a reliable connection and water cutoff property are ensured. The floating structure of the coaxial connector includes: a plug introduction hole 12 having an inner diameter larger than an outer diameter of the plug; an enlarged diameter hole 13 communicating with the tip side of the plug introduction hole 12; a locking ring 14 fixed in the enlarged diameter hole 13; a slider 15 having a slide ring 151 disposed movably in the axial direction and the axial radial direction; and an energizing elastic member 16 that energizes the slide ring 151 toward the locking ring 14. The plug body 6 is coupled to the slider 15, and the plug body 15 is held in the plug insertion part 9 movably in the axial direction and the axial radial direction.