A sliding window for a building, the sliding window comprising: - a fixed frame, - at least one leaf (3a, 3b), - a motorized drive device for moving the leaf by sliding relative to the fixed frame, ∘ the motorized drive device comprising: ▪ an electromechanical actuator, the electromechanical actuator comprising an electric motor, ▪ a flexible element, the flexible element being configured to drive the leaf in displacement relative to the fixed frame, when the electromechanical actuator is electrically activated, and ▪ a drive arm, the drive arm carrying a locking-control device, the drive arm and the locking-control device thus forming an integral mechanical sub-assembly, the drive arm being, on the one hand, attached to a frame of the leaf and, on the other hand, connected to the flexible element by way of the locking-control device, - a system of fittings, the system of fittings comprising a lock, so as to lock or unlock the leaf relative to the fixed frame, the lock being arranged inside the frame of the leaf, the locking-control device being configured to rotate a shaft of the lock, when the flexible element is driven by the electromechanical actuator, the sliding window also comprising a plate, the plate being arranged opposite the lock and interposed between the drive arm and the frame of the leaf, in an assembled configuration of the drive arm on the frame of the leaf, and the plate comprising: - first positioning elements configured to cooperate with positioning elements of the frame of the leaf, and - second positioning elements configured to cooperate with positioning elements of the drive arm. - a fixed frame, - at least one leaf (3a, 3b), - a motorized drive device for moving the leaf by sliding relative to the fixed frame, ∘ the motorized drive device comprising: ▪ an electromechanical actuator, the electromechanical actuator comprising an electric motor, ▪ a flexible element, the flexible element being configured to drive the leaf in displacement relative to the fixed frame, when the electromechanical actuator is electrically activated, and ▪ a drive arm, the drive arm carrying a locking-control device, the drive arm and the locking-control device thus forming an integral mechanical sub-assembly, the drive arm being, on the one hand, attached to a frame of the leaf and, on the other hand, connected to the flexible element by way of the locking-control device, ▪ an electromechanical actuator, the electromechanical actuator comprising an electric motor, ▪ a flexible element, the flexible element being configured to drive the leaf in displacement relative to the fixed frame, when the electromechanical actuator is electrically activated, and ▪ a drive arm, the drive arm carrying a locking-control device, the drive arm and the locking-control device thus forming an integral mechanical sub-assembly, the drive arm being, on the one hand, attached to a frame of the leaf and, on the other hand, connected to the flexible element by way of the locking-control device, - a system of fittings, the system of fittings comprising a lock, so as to lock or unlock the leaf relative to the fixed frame, the lock being arranged inside the frame of the leaf, the locking-control device being configured to rotate a shaft of the lock, when the flexible element is driven by the electromechanical actuator, - first positioning elements configured to cooperate with positioning elements of the frame of the leaf, and - second positioning elements configured to cooperate with positioning elements of the drive arm.