Nigerian Food Security Programme is centred on three-tier grain storage with active participation of traders in storage of 85% of grain requirements through the On-Farm Storage Programme. The study assessed grain storage technologies to determine suitable ones for storage and marketing by traders in Southwest Nigeria. A pre-data survey of recommended grain storage technologies was followed by multi- stage sampling of Oyo, Ondo and Ogun States for 120 rural and urban traders. Data were analysed with descriptive and inferential statistics at p = 0.05. Traders preferred recommended storage technologies except silo. Only sacks were preferred out of the indigenous storage technologies. Technology attributes and communication factors are essential for use of recommended storage technologies. There is no significant relationship between age (r = 0.86), income (r = 0.78) and use of recommended storage technologies while quantity of grains stored (r = 0.94), years of experience in grain storage (r = 0.93) and educational status (X2 = 9.51) were significantly related. Rural and urban traders were not significantly different in their levels of use of recommended grain storage technologies (tc = 0.20). Traders’ storage extension through the use of various channels of communication, trainings and adult education programme were recommended. Key words: Recommended technologies, indigenous technologies, determinants, use