Market participation plays an essential role in generating better income and enhancing welfare of smallholder farmers. This study was aimed to investigate the determinants of smallholder farmers' participation decision in beef cattle market in Dugda and Bora Districts. A multi-stage sampling procedure was used to select sample households for data collection. A total of 152 beef cattle producer sampled households were randomly selected from the districts and semi-structured questionnaires were used to collect data. Both descriptive statistics and probit econometric model were applied to analyze determinants of smallholder farmers' market participation decision in beef cattle market. The findings of the model showed that sex, age, education level of household head, family size, and number of beef cattle owned, crop income and access to market information were significantly affect smallholder farmers' market participation decision in beef cattle market. This study suggested that relevant policy interventions in the directions of above-mentioned aspects are vital to encouraging smallholder farmers' market participation decision in beef cattle market.