Shallots is one of nine basic food of houshold in Inonesia. Base on these fact, the development of shallots (include plantations and marketing) is one of priority on agricultural development policy. The reseach aims is to analysys of marketing functions, marketing channel, margins, profits, farmers share, and efficiency ofunion marketing in Sub-districtof Kuanfatu, South-Central Timor Regency. The data of reseach taken with interviews of 30 shallots farmers and 15 marketing players (snowball sampling). Analys data by margin of marketing analysis, marketing profit, farmer's share, and marketing efficiencyanalysis. The results of reseach shows three marketing channels in the research area i.e. channel one (farmers-retailers-consumers), channel two(farmers- collectors-retailers-consumers) and channel three(farmers-collectors-wholesalers-retailers- consumers). The marketing channel base of the target of marketing. Geographic position of market determinan of the marketing channel choices. The length of this marketing channel is very dependent on the onion advice market geographically. The farther the target market, the longer the market chain. This condition is also reflected in the margins and famers share of each available channel. As good as the channel short (channel 1) marketing margins are getting smaller, and parmers share getting bigger, and conversely the marketing margins are getting bigger on marketing channels that are getting longer