Abstract: The aim of present study was to determine the effect of previous plant on the chemical composition of sweet corn produced as a second crop. The previous plant had a significant effect on the chemical composition of sweet corn grain. The crude protein content of sweet corn grain obtained after Vicia sativa plant was significantly (p<0.001) higher than that obtained after wheat plant. The crude protein content of sweet corn grain ranged from 13.23-14.02% of DM. On the other hand, NDF, EE and NFC contents of sweet corn grain obtained after Vicia sativa plant was significantly (p<0.001) lower than that obtained after wheat plant. However, the previous plant had no significant (p>0.05) effect on the cellulose and ADF contents of sweet corn grain. There is a significant relationship among nutrients contents of sweet corn grains. The CP and ash content were negatively correlated with NDF and ADF, whereas the CP and ash content were positively correlated with EE and NFC contents of sweet corn grain. On the other hand, NDF content was negatively correlated with EE and NFC of sweet corn grain. The EE content was positively correlated with NFC. The previous plant affected the chemical composition of sweet corn grain obtained as a second crop. The sweet corn plant should be sown after Vicia sativa to obtain sweet corn grain with high protein, ash and non-fibre carbohydrate contents.