Coronavirus disease (COVID-19) is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), which spreads through droplets, aerosols, and contact. 1 Flexible bronchoscopy (FB) is a diagnostic and therapeutic modality for respiratory diseases but has a high risk of viral transmission via droplets and aerosols. Therefore, reducing healthcare workers' (HCWs) exposure is important. Bronchoscopy guidelines recommended postponement, but, if essential, HCWs should wear full personal protective equipment (FPPE). 2-4 Various measures have been reported to prevent splashing via reflex vomiting, sneezing, and coughing during esophagogastroduodenoscopy. 5 However, there are insufficient reports on FB despite the higher risk of cough reflexes than in esophagogastroduodenoscopy. Advanced bronchoscopic procedures, such as endobronchial ultrasound-guided transbronchial needle aspiration, require an operator/assistant to hold the scope near the patient's mouth. We modified the method of protection to reduce HCWs' droplet exposure without restricting operability (Fig 1a). We propose the use of a mouthpiece with tips for a fixing belt (HZ712804, U.S. Endoscopy Group Inc., OH, USA) and nonwoven fabric (NWF) (PROWIPE, DAIO PAPER Co, Tokyo, Japan) for daily use at each facility. The NWF can be firmly fixed to the mouthpiece (Fig 2). FB, including oral suction, can be conveniently performed through the central X-shaped cut of the NWF. Bronchoscopy guidelines suggest oral insertion through a small incision in a standard surgical mask (Fig 1f,i) or nasal insertion. 2-4 However, unlike the NWF, the mask is fixed to the patient's