A component supply device configured to output a predetermined number of components to be used in a work operation includes a fixing plate having a via-hole through which the components pass, the fixing plate being fixed to a housing, a movable plate having a storage hole penetrating through the movable plate in an up-down direction and having a size that allows the predetermined number of components to be stored, the movable plate being laminated on a top side of the fixing plate and configured to move such that the storage hole moves relative to the via-hole in a direction parallel to a top face of the fixing plate, a controller configured to control an operation of the movable plate, and an elastic member placed on a top side of the movable plate and configured to elastically deform in a direction parallel to a top face of the movable plate.