Manufacturing defects in the connector of the endotracheal tube are not frequently encountered in emergency and planned intubations. In cases where they are encountered, however, they may cause partial or complete airway obstruction in sick infants with limited reserves, giving rise to a life-threatening situation following the intubation. For this reason, endotracheal tubes must be checked carefully before use. To this end, a stylet can be passed through the tube to check for a defect in the tube lumen or tube connector as part of a routine check of an endotracheal tube. This report features a patient who experienced a complete airway obstruction following intubation due to a manufacturing defect in the connector of the endotracheal tube.