A stair-climbing hand truck comprising two casters held in a chassis and a supporting foot constituted by a two-arm lever having a lower support end and an upper end, a supporting foot guide connected to and guiding the upper end of the two-arm lever, a connecting rod having one end linked to the two-arm lever between the lower support end and the upper end, and an end opposite to the one end guided in a connecting rod guide extending transversely to the supporting foot guide, and a crank mechanism connected to the connecting rod.