A vehicle comprising a container for loading, transporting and unloading materials, said container extending longitudinally along a front-rear axis of the vehicle and comprising: - a left lateral wall and a right lateral wall, - an opening rear wall for unloading said materials - a movable partition extending transversely inside the container, - a first flexible mechanical connection one front end of which is connected to a left end of the partition and which extends first horizontally towards the rear of the vehicle along an inner face of the left lateral wall and then upwards or downwards via at least one first pulley, - a second flexible mechanical connection one front end of which is connected to a right end of the partition and which extends first horizontally towards the rear of the vehicle along an inner face of the right lateral wall and then upwards or downwards via at least one second pulley, the vehicle further comprising a motor assembly, the stator of which is fixed to the chassis of the vehicle and the rotor of which is connected to a rear end of the first and of the second mechanical connections (14a, 14b) to pull them and to thereby force the movable partition towards the rear of the container, the front end of the first mechanical connection is connected to the left end of the partition, at a height H1 comprised between 10% and 90% of a height H2 of the partition, the front end of the second mechanical connection is connected to the right end of the partition at the height H1, the left lateral wall comprises a first longitudinal part overhanging the first mechanical connection, the right lateral wall comprises a second longitudinal part overhanging the second mechanical connection, characterized in that the first flexible mechanical connection and the second flexible mechanical connection are connected together to form a single flexible mechanical connection, and in that said single flexible mechanical connection is freely connected to the movable partition. - a left lateral wall and a right lateral wall, - an opening rear wall for unloading said materials - a movable partition extending transversely inside the container, - a first flexible mechanical connection one front end of which is connected to a left end of the partition and which extends first horizontally towards the rear of the vehicle along an inner face of the left lateral wall and then upwards or downwards via at least one first pulley, - a second flexible mechanical connection one front end of which is connected to a right end of the partition and which extends first horizontally towards the rear of the vehicle along an inner face of the right lateral wall and then upwards or downwards via at least one second pulley, the vehicle further comprising a motor assembly, the stator of which is fixed to the chassis of the vehicle and the rotor of which is connected to a rear end of the first and of the second mechanical connections (14a, 14b) to pull them and to thereby force the movable partition towards the rear of the container, the front end of the first mechanical connection is connected to the left end of the partition, at a height H1 comprised between 10% and 90% of a height H2 of the partition, the front end of the second mechanical connection is connected to the right end of the partition at the height H1, the left lateral wall comprises a first longitudinal part overhanging the first mechanical connection, the right lateral wall comprises a second longitudinal part overhanging the second mechanical connection, characterized in that the first flexible mechanical connection and the second flexible mechanical connection are connected together to form a single flexible mechanical connection, and in that said single flexible mechanical connection is freely connected to the movable partition. the vehicle further comprising a motor assembly, the stator of which is fixed to the chassis of the vehicle and the rotor of which is connected to a rear end of the first and of the second mechanical connections (14a, 14b) to pull them and to thereby force the movable partition towards the rear of the container, the front end of the first mechanical connection is connected to the left end of the partition, at a height H1 comprised between 10% and 90% of a height H2 of the partition, the front end of the second mechanical connection is connected to the right end of the partition at the height H1, the left lateral wall comprises a first longitudinal part overhanging the first mechanical connection, the right lateral wall comprises a second longitudinal part overhanging the second mechanical connection, characterized in that the first flexible mechanical connection and the second flexible mechanical connection are connected together to form a single flexible mechanical connection, and in that said single flexible mechanical connection is freely connected to the movable partition.