A main body of a wire leading tool including a lid body that covers the main body in a detachable manner is configured to include a flat plate-shaped base portion, a base hole portion that is penetratingly provided in the base portion, a standing wall portion that stands from the base portion in a U shape and surrounds the base hole portion by a curved portion of the U shape, and a connector supporting portion that stands from the base portion at a position closer to the base hole portion relative to an open end of the U shape of the standing wall portion, is continuous to the standing wall portion on both sides, and has an insertion hole which is penetratingly provided for inserting a pipe connecter.