Abstract: The experiment was conducted in the farm of Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh during October 2012 to March 2013 to determine the effect of potassium and stem pruning on yield and economic analysis of tomato. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. The experiment consisted of two factors: Factor A: K0=0 kg K2O/ha, K1=150 kg K2O/ha, K2=160 kg K2O/ha and K3=170 kg K2O/ha; Factor B: P0=No pruning; P1=One stem pruning; P2=Two stem pruning and P3=Three stem pruning. In case of potassium, K3 produced the highest yield (65.96 t ha-1) and lowest yield (43.83 t ha-1) was from K0. For pruning, P3 produced the highest yield (66.86 t ha-1) and lowest yield (52.32 t ha-1) was obtained from P1.