A conveyor device, comprising: - a first axis equipped with at least two first pulleys rotating coaxially around a first rotation axis and spaced apart along said first rotation axis by a first distance; - a second axis provided with at least two second pulleys coaxially rotating around a second rotation axis and spaced apart along said second rotation axis by a second distance, wherein each first pulley is aligned with a corresponding second pulley along a movement direction of the conveyor device; - a conveyor belt extending between said first and second axis and wrapped around said first and second pulleys; - at least one pair of longitudinal guides extending along the movement direction and designed to support a transport section of the conveyor belt during movement; wherein said conveyor belt comprises: - a substantially flat base body made at least in part of rubberised cloth and having a first face, inner in use, and a second face, outer in use; said base body comprising a support central zone, extending along the movement direction and interposed between two traction lateral zones, wherein said lateral zones comprise at least one traction body made in one piece with the respective lateral zone and comprise a plurality of teeth projecting from the first face and arranged in succession along the base body to engage a first pulley and the respective second pulley, for moving the conveyor belt; - a plurality of cross bars extending transversely to said movement direction between said lateral zones, characterised in that: - the central zone of the base body of the conveyor belt has a first thickness "s1" and the lateral zones have a second thickness "s2", which is greater than the first thickness "s1"; - each lateral zone has a resistant band, which is external and where the traction body is located, and a sliding band, which is internal and is slidingly joined to the respective longitudinal guide when in the transport section. - a first axis equipped with at least two first pulleys rotating coaxially around a first rotation axis and spaced apart along said first rotation axis by a first distance; - a second axis provided with at least two second pulleys coaxially rotating around a second rotation axis and spaced apart along said second rotation axis by a second distance, wherein each first pulley is aligned with a corresponding second pulley along a movement direction of the conveyor device; - a conveyor belt extending between said first and second axis and wrapped around said first and second pulleys; - at least one pair of longitudinal guides extending along the movement direction and designed to support a transport section of the conveyor belt during movement; - a substantially flat base body made at least in part of rubberised cloth and having a first face, inner in use, and a second face, outer in use; said base body comprising a support central zone, extending along the movement direction and interposed between two traction lateral zones, wherein said lateral zones comprise at least one traction body made in one piece with the respective lateral zone and comprise a plurality of teeth projecting from the first face and arranged in succession along the base body to engage a first pulley and the respective second pulley, for moving the conveyor belt; - a plurality of cross bars extending transversely to said movement direction between said lateral zones, - the central zone of the base body of the conveyor belt has a first thickness "s1" and the lateral zones have a second thickness "s2", which is greater than the first thickness "s1"; - each lateral zone has a resistant band, which is external and where the traction body is located, and a sliding band, which is internal and is slidingly joined to the respective longitudinal guide when in the transport section.