| 摘要 |
A vehicle side section structure that is capable of a required stiffness and enables a reduction in weight of a roof side section is provided. A roof side rail that structures a vehicle side section structure is provided with: a roof outer panel that has length in a vehicle front-rear direction and is opened inward of the vehicle, and has a pair of upper and lower flanges; and a roof side frame member that is joined to the pair of upper and lower flanges of the roof outer panel at a pair of upper and lower flanges. The roof side frame member has, between the upper and lower flanges, an outward protruding portion that is protruded in a vehicle outward direction and an inward protruding portion 46 that is protruded in a vehicle inward direction, and in a sectional view cut orthogonally to the length direction, a length of a top wall of the outward protruding portion is longer than a length of a top wall of the inward protruding portion.
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