Background- Legionella pneumophilia causes infection having high mortality and morbidity rate presents in non-pneumonic (Pontiac fever) and acute pneumonic (Legionnaires` disease). They are detected in urine by Gram’s stain, culture on Buffered Charcoal Yeast Extract (BCYE) , Iummnochromatography Test (ICT) or by Enzyme Linked Immunosorbent Assay (ELISA). Aim- To detect Legionella pneumophilia antigen in urine by using two different methods by ICT and Gram’s stain in pneumonia patients. Material & Methods- The present study was a prospective study conducted in the Department of Microbiology & Medicine from July 2022 -April 2023 at RMCH&RC, Kanpur. Total 40 urine samples were collected from patients having pneumonia and stained with Gram’s Stain & antigen detection by ICT (CERTEST Legionella). Results - Out of 40 urine samples from pneumonia patients 35 were males and 5 were females in which 20 patients were from Non ICU and 20 were from ICU .The age group affected maximum was 60-65 years of age .The risk factors associated were Diabetes mellitus(17.5%), Chronic kidney disease(25%), Low respiratory rate(20%,)Immunocompromised patients(15%), Smokers(7.5%) and alcoholic(5%)were seen highly. According to the analysis, out of 40 patients a total of 2 ICU patients were positive in which 2 (5%) patients were positive for Legionella urinary antigen by card test and 1 (2.5%) patient were positive by Gram’s stain .The sensitivity and specificity of ICT, gram’s stain was found to be 100%, 97.43%, 50%, 100% and PPV and NPV of ICT and gram’s stain was found to be 50%, 100%,100%, 97.43%. Further analysis reports of ICT positive showed that the patients having leukocytosis was (5%), Diabetes mellitus(5%), Chronic kidney disease(5%)and with a history of past smoking(7.5%)& alcoholism(5%)was seen .Other organisms from Gram stain were observed and isolated from culture were Klebsiella pneumoniae (40%) which was the most common among patients of ICU and Non- ICU followed by Pseudomonas aeruginosa (20%) ,Acinetobacter baumanii (12.5%), Citrobacter koseri(15%), Morganella morganii(2.5%), Enterococcus spp.(10%) .The antibiotic susceptibility pattern shows sensitive to Polymyxin-B(100%), colistin(100%) and resistant to drugs ampicillin(20%), cefotaxime(20%) and for Legionella azithromycin(50%) and gentamycin (50%) were observed to be the most sensitive drug . Conclusion –ICT was found to be the rapid and more effective method when compared to other convectional method Gram’s stain with higher sensitivity and specificity. Hence, while investigating severe pneumonia patients requiring hospitilization with risk factors in ICU, Legionella test should be kept as a differential diagnosis for Legionnaire’s disease.