Adolescent girls are vulnerable in underdeveloped and developing countries due to having public health problems regarding iron deficiency anaemia. As zinc acts as a cofactor in iron metabolism, so the deficiency of this trace element is associated with iron deficiency anaemia. This study was done to evaluate the changes of serum iron and serum zinc levels among iron deficient anaemic adolescent girls in comparison to healthy adolescent girls in Bangladesh. This prospective type of analytical cross sectional study was carried out in the Department of Physiology, Mymensingh Medical College, Mymensingh, Bangladesh from July 2019 to December 2020. Total number of 140 adolescent girl's age ranged from10-19 years included in this study. Among them, 70 healthy adolescent girls, were taken as control group (Group I). Remaining 70 Adolescent girls with iron deficiency anaemia (IDA) were taken as study group (Group II). Estimation of serum iron was determined by Ferrozine method using Globals iron kit, UK. Serum zinc levels were determined by colorimetric method with reagents. All data were expressed as mean (±SD) and statistical significance of difference among the group I ( healthy adolescent girls) and group II (adolescent girls with iron deficiency anaemia) were calculated by unpaired students' 't' test. Correlation of serum iron with serum zinc was done by Pearson's correlation coefficient test. The mean values (±SD) of serum iron level of Group I and Group II were 69.06±18.11μg/dl & 15.61±9.12μg/dl respectively. Mean values (±SD) of serum iron significantly lower in study group (Group II) in comparison with control group (Group I). The mean (±SD) of serum zinc level of Group I and Group II were 75.48±14.26μg/dl & 33.27±12.94μg/dl respectively. Mean value (±SD) of serum zinc levels were significantly lower in study group (Group II) in comparison with control group (Group I). Serum zinc level was positively correlated with serum iron and that was statistically significant. The deficiency of iron does not occur alone; rather it is typically associated and developed with hypozincemia. The study suggests on supplementing iron along with zinc to correct the deficiency especially in adolescent girls when their metabolic demand is high.