Cabbage is highly nutritious, and it is an economically important vegetable in Ethiopia which is widely cultivated in Guji zone especially at highland districts. The study was aimed to analysis head cabbage value chain with the specific objectives of identifying actors, estimate marketing cost and margins identify determinants of market outlets choice decisions and head cabbage market supply in the study area. Data were collected from 128 farmers, 25 traders and 15 consumers and analyzed. Identified actors include input suppliers, producers, rural collectors, brokers/dealers, wholesalers, retailers, and consumers by which 94.63% of product pass through. The highest total gross margins 48.1% and highest producer gross marketing margin of 68.2% was recorded in channel V and II respectively. Total livestock unit, area allocated to head cabbage, market information and market distance as important factors affecting head cabbage market supply in the study area. Family size, land total, total livestock unit, transport facility, production experience, area allocated to head cabbage, extension service, training, credit access, off farm income and selling price determine market outlet choice decision of head cabbage producers in the study area. This study suggests improving farmers’ knowledge and experience on head cabbage production and marketing, encouraging producers through extension service, land allocation for head cabbage, improving productivity and volume sales, improving market information access, expanding accessibility of market infrastructure and strengthening supportive institutions like credit access. In addition to this, it shall be better to improve the farmers’ market margins by strengthening farmers-traders linkage through reducing brokers’ exploitation and solving related production and marketing problems there by establishing centers for wholesalers and retailers and linking producers with institution like university make producer more profitable in the study area.