Component-mounting device and work system

A component-mounting device comprising:

• a base;
• a board positioner provided in the base and configured to position a board;
• a feeder carriage attachable to and detachable from the base;
• a part feeder attached to the feeder carriage and configured to supply a component in a state where the feeder carriage is connected to the base;
• a mounting head having a nozzle configured to suck the component supplied by the part feeder and configured to mount the component on the board positioned by the board positioner;
• a nozzle replacement table configured to hold a replacement nozzle attached to or detached from the mounting head;
• a replacement table holder provided in the base and configured to hold the nozzle replacement table at a predetermined holding position within a movable range of the mounting head;
• and
• a placing table provided in the feeder carriage, the nozzle replacement table being placed on the placing table before the replacement table holder holds the nozzle replacement table,
• wherein the component-mounting device is configured to deliver the nozzle replacement table between the replacement table holder and the placing table in a state where the feeder carriage is connected to the base.