A wire harness manufacturing method comprising: an insertion step (S1) of inserting a binding member through an insertion hole of a protective member , the protective member including: a main body that forms a routing space (SP) in which the wiring member (W) is routed and has an opening that is open to one side in a first direction (X) in the routing space (SP); the insertion hole being a hole that is formed to penetrate the main body and through which the binding member can be inserted across inside and outside of the routing space (SP); a temporary retention notch that is formed in a recessed shape at an end of the main body on a side of the opening in the first direction (X) and allows insertion of the binding member in a state where the binding member is inserted through the insertion hole ; and a temporary retention projection that is formed to protrude from the main body toward a side of the temporary retention notch and capable of hooking and temporarily retaining the binding member in a state where the binding member is inserted through the temporary retention notch ; a temporary retention step (S2) of inserting the binding member , which is in a state of being inserted through the insertion hole , through the temporary retention notch and hooking the binding member , which is in a state of being inserted through the temporary retention notch , onto the temporary retention projection to achieve temporary retention of the binding member on the temporary retention projection ; a routing step (S3) of routing the wiring member (W) in the routing space (SP) in a state where the binding member is temporarily retained on the temporary retention projection ; and a binding step (S4) of detaching the binding member , which is in a state of being temporarily retained by the temporary retention projection , from the temporary retention projection and binding the wiring member (W), which is in a state of being routed in the routing space (SP), to the main body by the binding member . an insertion step (S1) of inserting a binding member through an insertion hole of a protective member , the protective member including: a main body that forms a routing space (SP) in which the wiring member (W) is routed and has an opening that is open to one side in a first direction (X) in the routing space (SP); the insertion hole being a hole that is formed to penetrate the main body and through which the binding member can be inserted across inside and outside of the routing space (SP); a temporary retention notch that is formed in a recessed shape at an end of the main body on a side of the opening in the first direction (X) and allows insertion of the binding member in a state where the binding member is inserted through the insertion hole ; and a temporary retention projection that is formed to protrude from the main body toward a side of the temporary retention notch and capable of hooking and temporarily retaining the binding member in a state where the binding member is inserted through the temporary retention notch ; a temporary retention step (S2) of inserting the binding member , which is in a state of being inserted through the insertion hole , through the temporary retention notch and hooking the binding member , which is in a state of being inserted through the temporary retention notch , onto the temporary retention projection to achieve temporary retention of the binding member on the temporary retention projection ; a routing step (S3) of routing the wiring member (W) in the routing space (SP) in a state where the binding member is temporarily retained on the temporary retention projection ; and a binding step (S4) of detaching the binding member , which is in a state of being temporarily retained by the temporary retention projection , from the temporary retention projection and binding the wiring member (W), which is in a state of being routed in the routing space (SP), to the main body by the binding member . <EOS>