To provide a storage opening/closing section structure which is simple in structure, easy to assemble, low in cost, and can arrange a lock mechanism of a grip at an arbitrary location of a peripheral edge where the grip of the opening/closing section is arranged.

According to the storage opening/closing section structure, a latch mechanism 11 is formed of: an L-shaped bifurcated lever 16 which is mounted on a pivot 14 protruding from a latch base plate 13, in a manner rotatable under application of a spring load, and formed into a latch hook 16A on one side and a grip link lever 16B on the other side; and a grip pivoting shaft 17 which can pivot a cover plate 18 fixed to the grip 12. Then the full-span grip 12 is formed like an E-shaped cross section, and the grip link lever 16B of the latch mechanism is thrust into an opening space enclosed by a pair of upper and lower horizontal projections of the E-shaped cross section, which grip link lever is then press-fitted to the horizontal projection 16B on the outside of the opening/closing section, under application of the spring load of the spring 15, to thereby bring about latch engagement and restoration of the grip to an initial location. By virtue of this structure, the lock mechanism can be set at the arbitrary location of the full-span opening grip 12.