A conveyor device, comprising: - a first axis equipped with at least two first pulleys rotating coaxially around a first rotation axis (A) and spaced apart along said first rotation axis (A) by a first distance; - a second axis provided with at least two second pulleys coaxially rotating around a second rotation axis (B) and spaced apart along said second rotation axis (B) by a second distance, wherein each first pulley is aligned with a corresponding second pulley along a movement direction (M) of the conveyor device; - a conveyor belt extending between said first (A) and second axis (B) and wrapped around said first and second pulleys ; - at least one pair of longitudinal guides extending along the movement direction (M) 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 (M) 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 (M) 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 (A) and spaced apart along said first rotation axis (A) by a first distance; - a second axis provided with at least two second pulleys coaxially rotating around a second rotation axis (B) and spaced apart along said second rotation axis (B) by a second distance, wherein each first pulley is aligned with a corresponding second pulley along a movement direction (M) of the conveyor device; - a conveyor belt extending between said first (A) and second axis (B) and wrapped around said first and second pulleys ; - at least one pair of longitudinal guides extending along the movement direction (M) 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 (M) 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 (M) 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 . <EOS>