Abstract: To provide a container supply device which is capable of improving accommodation efficiency of containers and simplifying accommodation work. The container supply device includes: a transfer mechanism which transfers the containers a feed position opposing a feed port of the containers of the container storage; and a feed mechanism which sequentially feeds the containers having been transferred to the feed position by the transfer mechanism toward the supply position through the feed port, wherein the transfer mechanism includes: one or more container mounting lane unit in which the containers are arranged so as to be movable in a column direction, the container mounting lane unit being arranged so as to be lined up in a row direction intersecting the column direction; and a lane transfer unit which moves the container mounting lane unit in the row direction and transfers the containers on a side of the feed port mounted on the container mounting lane unit to the feed position.