This study aims to investigate the long-term safety and efficacy of RELVAR® 100 ELLIPTA® (hereinafter referred to as "Relvar") in daily clinical practice in subjects with chronic obstructive pulmonary disease (COPD), who are naive to RELVAR. A total of 1000 subjects, from approximately 200 medical institutions, will be registered for this study and 332 of them will be considered for safety analysis. In the investigation, subject registration and data collection will be conducted using an Electronic Data Capture (EDC) system. Post-registration, the investigator will monitor the information regarding the safety and efficacy of RELVAR for one year from the start date of treatment with RELVAR. Pneumonia, systemic effects caused by corticosteroids and cardiovascular events will be considered as the priority investigation matters. At the end of observation period, the investigator will enter the obtained information into the EDC system and submit it. RELVAR 100 ELLIPTA is the registered trademark of GlaxoSmithKline (GSK) group of companies.