Conveyance system and storage unit

To provide a conveyance system in which a worker can easily reach and perform maintenance on a ceiling conveyance vehicle, lattice-shaped tracks, an article, or the like, in an article storage unit suspended from the lattice-shaped tracks. A conveyance system provided with: lattice-shaped tracks which comprises a plurality of first tracks that extend in a first direction and a plurality of second tracks that extend in a second direction differing from the first direction and intersect the first tracks, and which form a plurality of cells by means of the plurality of first tracks and by the plurality of second tracks , is provided with: ; a ceiling conveyance vehicle that travels along the lattice-shaped tracks; a hanging member that hangs from the lattice-shaped tracks; and a frame that encloses a cell in plan view and is provided at the bottom part of the hanging member. Below the cell in the frame, the conveyance system is provided with: a placement part on which an article is to be placed by the ceiling co