Experiment of  half diallel cross  among eight maize inbred lines was carried out during spring 2021.The varietal traits for F1 cross and parents with local hybrid were conducted during autumn 2021 Field of  College of Agricultural  Engineering  Sciences , University of Duhok, using Randomized  Complete  Block  Design with three replications .The results were revealed that the analysis of variance for genotypes and general and specific combining ability were significant effect on  studied traits , also the ratio of degree  of  dominance is  less  then one for all traits . The cross 7x8  gave the  heighest  value ( 219.35g)   for grain yield per plant and the same cross gave positive significant heterosis over mid parent , best parent and local hybrid .The heritability were high for  number of ear per plant and ear diameter with value( 0.55) and( 0.45) respectively,  the expected genetic advance was low  for yield and yield components.