A helical conveyor comprises a belt having a transport section for transporting products where the belt follows at least partly a helical path between a lower end and an upper end of the transport section and a return section where the belt follows a path. The conveyor comprises a lower end reverse guide for turning the belt upside down and reversing its direction of movement between the transport section and the return section at the lower end of the transport section and an upper end reverse guide for turning the belt upside down and reverting its direction of movement between the transport section and the return section at the upper end of the transport section. The return section leaves the upper end through a horizontally oriented upper return section portion and the return section leaves the lower end through a horizontally oriented lower return section portion.