A vibration welded article includes an outer member having a substantially V-shaped portion, and an inner member that is vibration welded to the outer member. The outer member includes a substantially plate-shaped base surface portion, and a slope portion formed obliquely relative to the base surface portion. The slope portion has an outer member opening which is opened to attach another component. The inner member includes a first joint surface portion that is vibration welded to the base surface portion, a second joint surface portion that is vibration welded to the slope portion, and at least one protruding portion that protrudes from the second joint surface portion toward the base surface portion.