A component type management device includes an association registration section configured to register association data in which individual identification information of a component supply device which is attached to a component mounter and supplies a component is associated with a type of the component held in the component supply device, an association discarding section configured to discard the association data in a case where a predetermined condition is satisfied after the component supply device is detached from the component mounter, a detachment discrimination section configured to discriminate whether the component supply device is detached by an automatic exchanging device; and an association maintaining section configured to invalidate a function of the association discarding section before the predetermined condition is satisfied and maintain the association data in a case of being discriminated that the component supply device is detached by the automatic exchanging device.