A component type management device comprising: 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 (93; 94; 95) and supplies a component, is associated with a type of the component held in the component supply device; characterized by a detachment discrimination section configured to: - acquire, from a control section of the component mounter, first identification information of the component supply device and first attachment-detachment information that said component supply device has been detached from the component mounter; - acquire, from a control section of the automatic exchanging device, second attachment-detachment information as to whether the automatic exchanging device holds the component supply device and second identification information of the held component supply device - discriminate that the component supply device is detached i) by an automatic exchanging device in case the first identification information is the same as the second identification information; and ii) manually in case the first identification information and the second identification information are different; an association discarding section configured to: - determine whether a predetermined condition is satisfied; - discard the association data in a case when the predetermined condition is satisfied after the component supply device is detached from the component mounter; and an association maintaining section configured, in the case of being discriminated that the component supply device is detached by the automatic exchanging device, to invalidate a function including the discarding of the association data by the association discarding section before the predetermined condition is satisfied and to maintain the association data. 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 (93; 94; 95) and supplies a component, is associated with a type of the component held in the component supply device; characterized by a detachment discrimination section configured to: - acquire, from a control section of the component mounter, first identification information of the component supply device and first attachment-detachment information that said component supply device has been detached from the component mounter; - acquire, from a control section of the automatic exchanging device, second attachment-detachment information as to whether the automatic exchanging device holds the component supply device and second identification information of the held component supply device - discriminate that the component supply device is detached i) by an automatic exchanging device in case the first identification information is the same as the second identification information; and ii) manually in case the first identification information and the second identification information are different; - acquire, from a control section of the component mounter, first identification information of the component supply device and first attachment-detachment information that said component supply device has been detached from the component mounter; - acquire, from a control section of the automatic exchanging device, second attachment-detachment information as to whether the automatic exchanging device holds the component supply device and second identification information of the held component supply device - discriminate that the component supply device is detached i) by an automatic exchanging device in case the first identification information is the same as the second identification information; and ii) manually in case the first identification information and the second identification information are different; i) by an automatic exchanging device in case the first identification information is the same as the second identification information; and ii) manually in case the first identification information and the second identification information are different; an association discarding section configured to: - determine whether a predetermined condition is satisfied; - discard the association data in a case when the predetermined condition is satisfied after the component supply device is detached from the component mounter; and - determine whether a predetermined condition is satisfied; - discard the association data in a case when the predetermined condition is satisfied after the component supply device is detached from the component mounter; and an association maintaining section configured, in the case of being discriminated that the component supply device is detached by the automatic exchanging device, to invalidate a function including the discarding of the association data by the association discarding section before the predetermined condition is satisfied and to maintain the association data.