A thermoelectric dehumidification rod comprises a bendable heat-dissipation tube formed with a wave structure at the surface, a thermoelectric element set in the heat-dissipation tube, and a power cable. Both ends of the heat-dissipation tube are covered by an end cap, respectively. The power cable is through one of the end caps and electrically connected with the thermoelectric element. Accordingly, the thermoelectric dehumidification rod is bendable and has the closed tube to protect the thermoelectric element. Furthermore, the wave surface of the heat-dissipation tube increases its surface area, enhancing the dissipation effect. Moreover, the thermoelectric dehumidification rod could be put on the curved surface due to its bendable characteristic, shortening the linear length of the whole thermoelectric dehumidification rod, or in a space which size is smaller than the linear length of the unbended thermoelectric dehumidification rod, so it is convenient for use and has more economic benefit.