Commodity rack of automatic vending machine

A commodity%ck of an automatic vending machine is disclosed which has a serpentine type passageway (5) extending in a vertical direction for storing articles (11) of cylindrical configuration. The passageway (5) is formed by a pair of vertical rows of guide rails (3, 4) each being constructed with a plurality of curved rail segments (2) arranged in succession. A plurality of auxiliary planar rail segments (12) is provided which is their stand-by state prior to introduction of the articles (11) are biased to project in an upwardly inclined direction into said passageway (5), and after introduction of the articles (11) each said auxiliary rail segment (12, 114) receives the articles (11) rolling in and along said passageway (5) and thereafter pivots downwardly under the dead weight of the article (11) to further advance said article. For further limiting the droping rate of the articles (11) during the dispensing of a sold article (11) the advancing operation necessary to remove one article is devided up into a plurality of advancing steps.