An electronic component mounting device (1) is provided with: a component supply unit (8) for supplying a component to a predetermined supply position by feeding a tape (T) in which the component is stored; a holder (5) for taking the component out of the component supply unit and mounting the component on a substrate; and a supply detection means (251) for detecting whether or not the component is supplied to the supply position or detecting the abnormality of the posture of the supplied component.
