In our country, the Black Sea region is a region where corn and beans are widely grown and consumed. In line with this information, this study was carried out in order to determine the effect of sweer corn and bean mixed planting system on some agronomic properties of sweet corn in Bafra district of Samsun province in 2021. The experiment was arrenged in a randomized block design with three replications. Covering corn; 1 row of corn, 1 row of beans; 1 row of corn, 2 rows of beans were tried as a mixed planting system. In the study, agronomic characteristics such as ear length, ear diameter, number of kernels per ear, ranged grain number, plant height, first ear height, number of ear and weight of the ear were investigated. According to the data obtained, plant height 224-239 cm, first ear height 70-78 cm, number of ear 1.2-1.3, ear weight 271-381 g, ear length 19-20 cm, ear diameter 39-42 cm, number of kernels per ear 15-16 pieces, ranged grain number was determined as 39-42 pieces. The Tukey comparison test was performed on the data obtained from the important features. As a result of the study, the effect of mixed planting practices on ear weight, ear length and row number were found to be insignificant, while the effect on other characteristics was determined to be significant. As a result of the data obtained, it was determined that the best results were obtained from the mixed planting arrangement of 1 row of corn and 2 row of beans.