In this study,the blood cells of Hawksbill Turtle (Eretmochelys imbricata) and Green Sea Turtle (Chelonia mydas) were observed. A total of 7 types of blood cells were identified: erythrocytes,lymphocytes,monocytes,heterophils,eosinophils,basophils and thrombocytes. Morphological characteristics of blood cells were similar to those of cells from other reptiles except that C.mydas had both large and small eosinophils. The leukocyte differential count indicated that the predominant leukocytes were heterophils,followed by lymphocytes and monocytes. A few eosinophils and a very few basophils could be observed,especially the basophils could not be observed in E.imbricata. The red blood cell count was (346.7±68.4)×10³ cell/μl in E.imbricata,fewer than that in C.mydas[(403.3±170.6)×10³ cell/μl],while the white blood cell count [(7.7±1.9)×10³ cell/μl] and thrombocyte count[(9.6±2.2)×10³ cell/μl] in E.imbricata were higher than those in C.mydas (7.3±2.8)×10³ cell/μl,(7.5±3.7)×10³ cell/μl,respectively .