A conveying device having: at least one first and one second conveying carriage which are arranged one behind the other in a conveying direction (F), a transverse-belt conveyor which is formed on at least the second conveying carriage and which serves for conveying material for conveying in a transverse conveying direction (Q) oriented substantially transversely with respect to the conveying direction (F), characterized in that the conveying device has a drivetrain brake for the transverse-belt conveyor , wherein the drivetrain brake has a brake apparatus and an operating apparatus for the brake apparatus , wherein the operating apparatus is arranged on the first conveying carriage and the brake apparatus is arranged on the second conveying carriage , wherein the brake apparatus can be placed into a braking state in which the brake apparatus exerts a braking force on an element of a drivetrain of the transverse-belt conveyor , and can be placed into a release state, in which the brake apparatus exerts no or a reduced braking force on an element of a drivetrain of the transverse-belt conveyor , wherein the operating apparatus and the brake apparatus interact such that, during substantially straight-ahead travel of the first and second conveying carriage , the brake apparatus assumes the release state and, during travel of at least one of the conveying carriages around a curve, the brake apparatus assumes the braking state, in order to allow a movement of a transverse belt of the transverse-belt conveyor in the transverse conveying direction (Q) during straight-ahead travel and to brake such a movement during travel around a curve. at least one first and one second conveying carriage which are arranged one behind the other in a conveying direction (F), a transverse-belt conveyor which is formed on at least the second conveying carriage and which serves for conveying material for conveying in a transverse conveying direction (Q) oriented substantially transversely with respect to the conveying direction (F), characterized in that the conveying device has a drivetrain brake for the transverse-belt conveyor , wherein the drivetrain brake has a brake apparatus and an operating apparatus for the brake apparatus , wherein the operating apparatus is arranged on the first conveying carriage and the brake apparatus is arranged on the second conveying carriage , wherein the brake apparatus can be placed into a braking state in which the brake apparatus exerts a braking force on an element of a drivetrain of the transverse-belt conveyor , and can be placed into a release state, in which the brake apparatus exerts no or a reduced braking force on an element of a drivetrain of the transverse-belt conveyor , wherein the operating apparatus and the brake apparatus interact such that, during substantially straight-ahead travel of the first and second conveying carriage , the brake apparatus assumes the release state and, during travel of at least one of the conveying carriages around a curve, the brake apparatus assumes the braking state, in order to allow a movement of a transverse belt of the transverse-belt conveyor in the transverse conveying direction (Q) during straight-ahead travel and to brake such a movement during travel around a curve. <EOS>