A technology for a stretchable webbing is provided including a long inflatable belt for restraining a vehicle occupant, which is effective in preventing slippage between yarns and fray while ensuring webbing rigidity. One embodiment includes a stretchable webbing having a long inflatable belt for restraining a vehicle occupant and an inserting yarn of the stretchable webbing having a first filament element and a second filament element which extend adjacent to and parallel with each other, where the second filament element is composed of a low-fusing point fiber having a fusing point lower than that of the first filament element.