Erythropoietin is generated mainly in peritubular interstitial cells of the kidney. In chronic kidney disease with anemia patients, the kidney could not generate enough erythropoietin to stimulate red blood cell produced in bone marrow. The clinical application of erythropoiesis-stimulating agents (ESAs) improve anemia, decrease the treatment of blood transfusion, and improve the quality of life in chronic kidney disease patients. The administration route and dosage of ESAs are determined by patient's disease status, the current hemoglobin level, and the target hemoglobin level. The clinical use of ESAs can follow the clinical guideline. In patients with hypo-response to ESAs, search for the etiology aggressively and correction are indicated.