A wire harness manufacturing method includes manufacturing a standard-size electric wire in which a terminal-equipped electric wire which is connected to a terminal is manufactured in lot units for each type, clamping the terminal-equipped electric wire to a pair of electric wire clips, dispensing a plurality of terminal-equipped electric wires respectively clamped by the electric wire clamps to electric wire holders, storing the plurality of the terminal-equipped electric wires temporarily in the electric wire holders, locking the both end portions of the terminal-equipped electric wire to an electric wire clip tool respectively and aggregating an electric wire group configuring a wire harness at the electric wire clip tool to form a harness set, and detaching the end portions of the terminal-equipped electric wire from the harness set and inserting the terminal connected and fixed into a terminal accommodating chamber of a connector housing.