The usefulness of blood metabolic profile in calves reared in the south-eastern region of Poland for the evaluation of mineral balance was studied. The investigations covered 18 calves of both sexes in the age between 1 and 4 months of life. Blood for investigations of the metabolic profile was taken 4 times, at the 1, 2, 3 and 4-th month. The average levels of the determined blood parameters assumed the following values: Ht - 0,3371/1, Hb - 6,08 mmo.l/l, erythrocytes - 6,74 T/l, leukocytes - 7,83 G/l, total protein - 62,1 g/l, glucose - 2,65 mmol/l, cholesterol - 3,65 mmol/l, AspAT - 19,8 U/l, AlAT - 12,4 U/l, AP - 67,5 U/l, Ca - 2,52 mmol/l, Pn - 1,70 mmol/l, Mg - 0,66 mmol/l, Na - 97,4 mmol/l, K - 5,5 mmol/l, Zn - 19,1 umol 1/1, Cu -. 14,4 /amol/l, Fe – 22,4 umol/l. The obtained results show that the values of inorganic phosphorus, magnesium and copper in blood serum were on a low level and the conducted investigations of the blood metabolic profile proved useful for the evaluation of mineral balance in calves.