Improving the practicality of: a bulk component supply system which includes a bulk component supply device which is moved together with a mounting head; and a method for replenishing bulk components to that bulk component supply device. A passage-equipped component case of a bulk component supply device which is moved together with a mounting head is removed, held by the empty one of case holding sections 450 and 452 of slide 404 in the bulk head component case exchange region; and bulk components are replenished and a passage-equipped component case being held on the other of the case holding sections 450 and 452 is held on the mounting head. Slide 404 is moved to a bulk component replenishment region, and components are automatically replenished from bulk component storage vessel 600 to the passage-equipped component case received from the mounting head which is empty. After replenishment, slide 404 is moved to a bulk component case exchange region and is put on standby for exchange of passage-equipped com
