A standalone type reel holding device configured to be set separately to a component mounter provided with a component supply device, the component supply device including multiple feeder devices and a main-body-side reel holding section configured to hold multiple tape reels around in a rotatable and exchangeable manner, wherein the standalone type reel holding device holds separately-located tape reels different to the tape reels held by the main-body-side reel holding section in a rotatable and exchangeable manner, and supplies carrier tapes wound on the separately-located tape reels to the feeder devices. Thus, it is possible to increase the overall quantity of carrier tapes supplied to feeder devices from the main-body-side reel holding section and the standalone type reel holding device.