Abstract: A method for automatic loading of trays into a cart, where the cart is adapted to receive trays at different vertical tray levels, comprises detecting the tray levels with a tray level sensor and lifting the cart with a lifting device from a floor to different vertical positions such that the tray levels in the cart will be at the same vertical level as a loading surface of a conveyer arrangement, which transports the trays to the cart on the loading surface. The method also comprises activating tray stoppers to stop the movement of the trays on the loading surface until the cart is at a correct vertical position, and deactivating the tray stoppers to allow the trays to be loaded into the cart when the cart is at a correct vertical position. The cart is lifted and loaded until all tray levels have been filled, and then the cart is again lowered to the floor. An apparatus for automatic loading of trays into a cart according to the method is also provided.