To provide a long seamless belt having a core formed of a seamless fabric of any circumferential length and hollow-woven by weaving the hollow-woven fabric having a circumferential length of two times the width of a weaving machine or more, and a method of manufacturing the long seamless belt.

When the fabric forming the core of the belt is woven, Four heddles 7 having eyelets 7a for inserting warps T therethrough are disposed. While the pair of two heddles are operated for opening in order, wefts Y are driven, and a reed striking operation is performed while a warp layer of 2n layer is formed. While the wefts Y are turn around two times, a tubular seamless fabric WA having a circumferential length of 2n times the weaving width of the weaving machine is woven in all warp layers as continuous multi-layer fabric structure. Thus, the long hollow-woven WAA can be provided.