A wire harness manufacturing method includes: an insertion step of inserting a binding member into an insertion hole of a protective member including a base member forming a routing space, the insertion hole provided in the base member and into which the binding member is insertable, and a temporary holding part provided on an outer surface of the base member and capable of temporarily holding an end of the binding member in a state in which the binding member is inserted into the insertion hole; a temporary holding step of temporarily holding the end of the binding member; a routing step of routing an electric wire in the routing space; and a binding step of removing the end of the binding member from the temporary holding part, and binding the electric wire to the base member by the binding member.