Mustard is a leading oil crop in Bangladesh. The study was conducted in four major Binasarisha-4 growing areas of Bangladesh, namely Jashore, Kushtia, Magura and Faridpur district to estimate the socio-economic profile, profitability and technical efficiency of the variety. In total, 160 farmers, 40 from each district were randomly selected as sample size for conducting the study. In the sampled areas data were collected through pre-designed interview schedule from February-March, 2017. Tabular, descriptive statistics and Cobb-Douglas production frontier model were used to fulfill the objectives. In the study, costs and return analysis were done on both cash cost and full cost basis for estimating profitability. The study found that Binasarisha-4 production is profitable. The average net return per hectare was Tk. 29113.30. The net return was highest in Magura (Tk. 33060.19/ha) followed by Kushtia (Tk. 32195.20/ha), Jashore (Tk. 28227.04/ha) and Faridpur (Tk. 22970.78/ha) respectively. Benefit cost ratio was 1.71 and 2.65 on full cost and cash cost basis. The stochastic Cobb-Douglas production frontier model was used for estimating technical efficiency of Binasarisha-4 producer in the study areas. About 61% Binasarisha-4 farmers could achieve 89.5% technical efficiency implying that they could increase Binasarisha-4 productivity through increasing their technical efficiencies in many issues, such as education, income and farming experience. Farmers faced some constraints in cultivating of the variety. Out of them the major constraints were inadequate supply of quality seeds, higher price of fertilizers & insecticides, lack of training, lack of technical know-how, natural calamities, higher charge of irrigation and Infestation of insects.