The agriculture sector supports the livelihoods of the majority of the population in Rwanda. Currently, the sector is dominated by smallholder farmers most of whom are women. In order to modernize and transform agriculture to market orientation, the government has put in place agriculture sector development programs for instance the Crop Intensification Program. One of the targeted crops in the program is the common bean. Nearly all households in Rwanda produce the common bean. Though there are potential welfare gains from participating in common bean output markets, the level of market participation in common bean market is still low. There are gender disparities in the ownership and control of productive assets in Rwanda. This study therefore was a gendered assessment of determinants of market participation among smallholder common bean farmers in Rwanda. The specific objectives of the study were: to characterize the socio economic attributes of the smallholder common bean farmers by gender, to assess the determinants of market participation and extent of market participation in common bean markets among the smallholder common bean farmers by gender and to determine the factors influencing choice of common bean marketing outlets in Rwanda. Multistage sampling procedure was used to select 385 respondents.