The experiment was conducted in the field of poultry of the Department of Animal Production at the College of Agriculture/ University of Kirkuk for the period from 25/12/2015 until 05/03/2016 for a period of 70 days (birds was fed for 10 days as a period of preliminary) in order to study the effect of the form of the diet (mash or pellet or their mixture) upon some performance and quality traits of egg of ISA BROWN laying hens, A total 105 layer at 54 week-age were distributed randomly to 5 treatments with 7 replicates for each replicate، The layers fed with layer diet and water was ad libitum and the treatments of this study were: T1: the diet 100% in the form of mash T2: 75% diet in the form of mash + diet 25% in the form of pellets, T3: 50% diet in the form of mash + diet 50% in the form of pellets, T4 : 25% diet in the form of mash + diet 75% in the form of pellets and T5 : the diet 100%, in the form of pellets, The results of statistical analysis showed there were no significant differences between the treatments in average egg production, egg weight, egg mass, feed intake, feed conversion ratio, energy conversion ratio and protein conversion ratio, as well as there were no significant differences between treatments in shell weight, shell thickness, Haugh Unit, albumin weight, albumin index, yolk weight, yolk index, While it found a significant decrease )P<0،05) in average albumin height in T2 compared with other treatments.