Abstract: The present invention is directed to a rack structure for use in vending machines of the serpentine stack type which comprises a pair of rack halves each formed in a single unitary body, said rack halves when combined together in face to face relation having at least one serpentine passage for accommodating a plurality of articles. At least one of pair of rack halves comprises a side wall and a plurality of rows of ramp assemblies projected from said side wall, each ramp assembly having ramp members protruding into respective spaces each defined between the adjacent two ramp members of the other ramp assembly so as to define the serpentine passage.