Pulmonary nocardiosis is a rare entity. Here we present three cases misdiagnosed with a differential of lung malignancy or Tuberculosis and so treated having not shown any improvement and referred to Department of Respiratory Medicine United Institute of Medical Sciences Prayagraj (Allahabad), between January 2021 to December 2022. All the cases had fever, cough, expectoration for months together. We thoroughly evaluated all the cases clinicoradiologically and bacteriologically and finally reached the diagnosis of pulmonary nocardiosis and treated to complete resolution.