Nocardiosis is an uncommon but possibly serious pulmonary infection. It typically affects patients with immune suppression or structural lung disease, but can be isolated in immunocompetent patients without a definable predisposing condition. Pulmonary nocardiosis is a rare disease and now a days its incidence is increasing due to increased use of immunosupreseeive therapy and HIV infection. We report a case of nocardiosis in 65 year old female patient clinically diagnosed as chronic obstructive pulmonary disease (COPD) treated with steroids and beta antagonist and anticholinergic drugs. Presented with nonresolving pneumonia and radiologically mimicking tuberculosis. Sputum analysis revealed Gram positive and acid fast thin beaded and branching filamentous bacteria.