To provide a belt carrying device without causing the partial presence of a belt.

This belt carrying device has an endless belt wound on at least two or more of rollers. The belt carrying device is characterized by being constituted so that among the rollers, at least one or more of rollers have a spiral recessed part or a projection part on its surface, and the endless belt has a core body composed of the weft extending in the peripheral direction and the warp extending in the width direction, and partial presence force in the predetermined direction caused in the endless belt by constituting the weft of the endless belt of thread in the predetermined twist direction, is offset by partial presence force caused in the endless belt by the spiral recessed part or the projection part of the rollers.