Gas absorption/desorption unit and gas absorption/desorption device

Provided are a gas absorption/desorption unit and a gas adsorption/desorption device, in which a gas adsorbent can be more easily heated uniformly. A gas absorption/desorption unit 2 according to the present invention is provided with: one or a plurality of first honeycomb structure bodies 20, each of which is provided with a honeycomb structure part 25 and a pair of electrode layers 26 arranged on an outer peripheral wall 250 in the honeycomb structure part 25 or end surfaces of the honeycomb structure body 25, in which the honeycomb structure part 25 has the outer peripheral wall 250 and partitioning walls 251 that are provided inside the outer peripheral wall 250 and define and form a plurality of cells 251a forming flow passages extending from one end surface to the other end surface; and an electrode terminal 21 connected to the pair of electrode layers 26. At least one honeycomb structure part 25 in the one or plurality of first honeycomb structure bodies 20 contains a gas adsorbent 27 and is made from