This study was conducted to determine optimum lateral spacing for drip-irrigated sweet corn. For this purpose, three different drip irrigation systems were planned. Irrigation treatments consisted of two different plant row spacings (standart 0.70 m and one narrow one wide row spacing, 45-95-45 cm) and two different lateral spacings, (0.70 m and 1.40 m). Effects of different lateral spacing on sweet corn yield and quality parameters were investigated. In the calculation of irrigation water, the percentage of wetted area is taken as 75%. Different lateral designs had significant effects on yields. The maximum fresh cob yield and single cob weight was obtained from a lateral line for each plant row. The differences in cob yields of the other two treatments (the ones with a lateral line for two plant rows) were not found to be significant.