The copper deficiency in children and adolescent from Szczecin. The copper concentrations in blood serum and in hair were measured in group of 420 healthy children aged from 5 to 18 from Szczecin. Measurements were done by AAS method. Copper deficiency was noted in our's own studies. The lower levels of this trace element were observed in 13,8% of children population in serum and in 0,7% in hair. However, average of copper levels are in fact lower than in other studies in hair.