A chassis assembly for a delivery vehicle, the chassis assembly including at least: - a vehicle chassis extending along a longitudinal direction, - a first supporting part configured to support a first load unit (7.1) on a first longitudinal side (4.1) of the vehicle chassis, - a second supporting part configured to support a second load unit (7.2) on a second longitudinal side (4.2) of the vehicle chassis opposite to the first longitudinal side (4.1), and - a lifting device secured to the vehicle chassis and configured to lift up and down the first and second supporting parts (6, 8) with respect to the vehicle chassis so as to vertically displace each of first and second load units (7.1, 7.2) supported by the first and second supporting parts (6, 8) between a loading/unloading position and a driving position wherein the first supporting part includes a first supporting frame secured to the lifting device and located on the first longitudinal side (4.1) of the vehicle chassis, and the second supporting part includes a second supporting frame secured to the lifting device and located on the second longitudinal side (4.2) of the vehicle chassis, characterized in that the first supporting part further includes a pair of first attachment members secured to the first supporting frame and configured to cooperate with respective attachment elements provided on both lateral sides of a first load unit (7.1) intended to be supported by the first supporting part, and the second supporting part further includes a pair of second attachment members secured to the second supporting frame and configured to cooperate with respective attachment elements provided on both lateral sides of a second load unit (7.2) intended to be supported by the second supporting part, each of the first and second attachment members (27, 28) is elongated and extends substantially horizontally. - a vehicle chassis extending along a longitudinal direction, - a first supporting part configured to support a first load unit (7.1) on a first longitudinal side (4.1) of the vehicle chassis, - a second supporting part configured to support a second load unit (7.2) on a second longitudinal side (4.2) of the vehicle chassis opposite to the first longitudinal side (4.1), and - a lifting device secured to the vehicle chassis and configured to lift up and down the first and second supporting parts (6, 8) with respect to the vehicle chassis so as to vertically displace each of first and second load units (7.1, 7.2) supported by the first and second supporting parts (6, 8) between a loading/unloading position and a driving position wherein the first supporting part includes a first supporting frame secured to the lifting device and located on the first longitudinal side (4.1) of the vehicle chassis, and the second supporting part includes a second supporting frame secured to the lifting device and located on the second longitudinal side (4.2) of the vehicle chassis, characterized in that the first supporting part further includes a pair of first attachment members secured to the first supporting frame and configured to cooperate with respective attachment elements provided on both lateral sides of a first load unit (7.1) intended to be supported by the first supporting part, and the second supporting part further includes a pair of second attachment members secured to the second supporting frame and configured to cooperate with respective attachment elements provided on both lateral sides of a second load unit (7.2) intended to be supported by the second supporting part, each of the first and second attachment members (27, 28) is elongated and extends substantially horizontally.