A wiring member includes: a flat wiring member including a sheet member, and a plurality of wire-like transmission members fixed on the sheet member in a parallel state; and a protective member configured to accommodate the flat wiring member. The protective member includes a placement surface on which the sheet member is placed. The sheet member includes a disposition region in which the plurality of wire-like transmission members are disposed. The sheet member is placed on the placement surface so that at least the disposition region extends along the placement surface.