Absolute Iron Deficiency Anemia (IDA) is one of the complications in the End State Renal Disease (ESRD) patients undergoingmaintenance hemodalysis, with an incidence of 76.4%. If this condition is not properly addressed, it can lead to impaired cardiac functionand increased mortality. The incidence of this case is between 30−45%. The determination of the iron status in ESRD patients wqs setby the Perhimpunan Nefrologi Indonesia 2011 using serum ferritin and transferrin saturation, but they do not provide a meaningfulchange in the value of the initial state of the iron deficiency. This condition should be examined with other parameters combination aswell as those influenced by diurnal variation and infection-inflammation condition. Reticulocyte hemoglobin (Ret-He) parameter canbe used as a marker of bone marrow iron availability because these reticulocytes are young erythrocytes released from the bone marrowinto the circulation. These conditions were circulated only within a short time about 1-2 days before becoming mature erythrocytes. Theaim of this study was to determine the Ret-He level diferentiation between absolute IDA and non absolute IDA states in ESRD patientswhom underwent maintenance hemodialysis. This research was conducted in the Laboratory of Clinical Pathology-RSHS-Bandung fromSeptember 2012 to June 2013. The study design was cross-sectional. All subjects were ESRD patients undergoing hemodialysis maintenancefor at least three (3) months and consisted of absolute IDA and non-absolute IDA based on the results of the ferritin and transferrinsaturation calculations according to the criteria of Pernefri 2011 Reticulocyte hemoglobin levels were checked using a fluorescenceflowcitometry principle in the automated hematology analyzer. In this study it was found that the Ret-He mean in the absolute IDA was26.1 pg/cell and 35.9 pg/cell in non absolute IDA. Statistical analysis was performed using Independent T-test. A total of 61 undergoingmaintenance hemodialysis subjects participating in this study comprised patients with absolute IDA and non-absolute IDA who met theinclusion and exclusion criteria. It can be concluded that the Ret-He level in statistical analysis showed absolute IDA which was meaningfullower than nonabsolute IDA in ESRD patients undergoing maintenance hemodialysis (p<0.001).