Objective: The purpose of this study is to identify the prevalence of iron deficiency anaemia (IDA) in helicobacter pylori-infected patients. Study Design: Prospective/cross-sectional study Place and Duration: This study was conducted at Benazir Bhutu Hospital Rawalpindi during the period from July, 2022 to September, 2022. Methods: Total 105 patients of Helicobacter pylori infection, who ranged in age from 18 to 65 years included. All patients gave their informed written consent after being asked about their age, sex, body mass index, level of education, and place of residence. Blood samples from the subjects were analysed to determine their levels of serum iron, transferrin saturation, ferritin, and total iron-binding capacity. H. pylori infection can be found by histopathology, stool antigen testing, a fast urease test, or a urea breath test. The entire data set was analyzed using SPSS 24.0. Results: Among all there were majority females. Majority of the patients were illiterate and were from rural areas. 60 (57.1%) had poor socio-economic status. Mean Hemoglobin level was 12.1±0.6 (g/dl) mean serum iron level was 49.8 ±10.33(ug/dl) and mean serum ferritin level was 121.7±42.87 (ng per ml).Frequency of iron deficiency anemia was found in 43 (40.95%) patients. Among 43 cases of IDA, majority of the patients had age >35 years. Conclusion: In this research, we found that patients with helicobacter pylori infection, the majority of whom were adult female patients, had a considerably greater frequency of iron deficiency anaemia. Keywords: Prevalence, H.pylori infection, Iron Deficiency Anemia (IDA), Females