Half diallel set of crosses between six inbred lines of maize were executed at Maize Research Department, General Commission for Scientific Agricultural Research (GCSAR), Syria, during 2010 and 2011 seasons to study heterosis, general and specific combining ability components for grain yield (ton/ha), ear height, length and diameter (cm), and silking date (day) compared with control varieties Basel-1 and the hybrid Spirou S-4- 985 to identify the best hybrid in terms of yield. Randomized Completely Block Design (RCBD) was used with three replicates.