A pot experiment was conducted during the winter (rabi) season of 2020-21 to assess the effect of modified clay mineral and redmud (Fe-bentonite, DMSO-bentonite and Fe-redmud) on Arsenic (As) uptake and yield attributes of Indian mustard [Brassica juncea (L.) (Variety- Rohinga bullet)]. Significant reduction in As concentration in the grain and stem due to application of modified clay mineral and redmud was observed. However, Fe-bentonite, DMSO-bentonite and Fe-redmud reduce plant grain and stem As content @ all the applied doses (except control pot), but application @ 5.00 g kg-1 soil was found most significant as compare to the control pot and 1.25 g kg-1. Soil treated with iron modified bentonite, DMSO-bentonite and Fe-redmud resulted in significantly higher stem biomass and grain yield of mustard as compared to the control pot. Between the treatments, highest stem weight (g pot-1) of mustard plant was recorded at higher dose of Fe-bentonite followed by DMSO-bentonite and Fe-redmud but higher grain yield (g pot-1) was found higher in case of higher dose of Fe-Redmud.