The present invention discloses a support arm of a liquid crystal panel transportation device, which includes a primary arm section. The primary arm section includes a plurality of ancillary arm sections that are rotatable to open mounted thereon. The present invention also discloses a liquid crystal panel transportation device. Using the liquid crystal panel transportation device and the support arm structure thereof according to the present invention may effectively control the deflections of the opposite edges of a liquid crystal panel during the transportation of the liquid crystal panel and the transportation device can be used to transport liquid crystal panels of various sizes without replacing the support arm to thereby further reduce the cost and improve throughput.