To provide a ring-form metal cord which can maintain a wound shape without loosening a twisted state even when subjected to continuing repeated loads, to provide an endless metal belt, and to provide a method for producing the ring-form metal cord.

The ring-form metal cord C1 is produced by untwisting an original cord 20 prepared by twisting at least six strands 1, wherein one strand 1 is wound at least six turns in the form of a ring while inserting an excess part 1e into a spiral space 5 left after extracting other strands 1, the inner diameter Di of a hollow part C1a formed at the ring-form winding center of the strand 1 and the diameter Ds of the strand 1 satisfy the relationship of Di/Ds≥1.07, and both terminals 1a, 1b of the strand 1 are held in the hollow part C1a at a length longer than one turn length of the ring.