In this Study, levels of some biochemical parameters such as plasma total protein, albumin, cholesterol, glucose, vitamin A, vitamin C, sodium (Na) and potassium (K) and the difference between species in this paramelers were investigated in 20 healthy and fertile (aged between 2-3 years old) rams consisted 5 Merino. 5 Akkaraman, 5 Awassie and 5 Corriedale breeds. The blood samples were taken 4 times every 2 days in November. The average values of plasma total protein, albumin, cholesterol, glucose, vitamin A, vitamin C. Na and K in rams were 8.13±0.14 gI dl. 3.12+0.06 g/dl. 50.24±2.18 mg/dl, 75.39±3.11 mg/dl, 66.91±1.35 µg/dl, 1.17±0.08 mg/dl, 130.34±3.07 mmol/L and 4.38±0.14 mmol/L, respectively. Between the species plasma glucose levels were only found statistically significant (P<0.01).