Background and objectives: Sinusitis is an exceptionally common disease more so maxillary sinusitis. The objective of the study was to do a comprehensive clinical study of chronic maxillary sinusitis. Methods: This was a descriptive time bound study conducted between 2020-2021, at the Department of ENT, DMCH, Darbhanga. A total of 70 patients with diagnosis of chronic maxillary sinusitis were included in the study. Among these Inferior meatal antrostomy was performed in 30 patients, Middle meatal antrostomy in 30 patients and Caldwell-Luc’s operation in 10 patients. All patients were followed up for a period of six months and improvement in signs and symptoms were documented.