The study was conducted during rabi 2011-12 and 2012-13 to determine the role of honeybees in quantitative yield parameters of mustard (Brassica juncea L.). The mustard variety 'Varuna' was grown following all the recommended agronomic practices. The plots were kept unsprayed throughout the crop season. The colonies of honeybee (Apis cerana indica Fab.) were placed in hives before the initiation of flowering. The present study contained 3 pollination treatments, viz., Plants kept open to all pollinators (T1), Plants caged with Apis hives (T2) and plants caged without access to any pollinators (T3). The difference in siliquae per plant, seeds per siliqua, thousand seed weight, seed yield per plant and per plot were found significant (p<0.05) and highest values were obtained from open pollination, followed by plants caged with honey bee hives and plants caged without access to any pollinators. The introduction of honeybees in agricultural crops plays a dynamic role in pollination which in turn resulted in higher production.