The share of meat and other slaughter by-products exported from the overall export commodities is not more than 2% and meat consumption is below the average of Sub-Sahara African countries. So, marketable supply of beef cattle have important role in making better income for smallholder farmers. As a result the study was aimed to investigate the impediment that affects beef cattle marketable supply in Gimbo district. Two-stage sampling technique was employed to pick up 196 target sample respondents from the sample frame in the study area. Multiple linear regression models were used for analysis. As the model result indicates: marketable supply of beef cattle were affected positively by: number of livestock fattened, sex of household head, perception of current price, access to credit , area of land allocated for grazing ,access to market information and educational status. So, improvement of fattening management systems should be taken in to consideration to increase marketable supply of beef cattle in the study area as well as at country level.