To provide a vapor recovery device capable of making the most of the capacity of the adsorption/desorption towers and efficiently adsorbing and desorbing fuel oil vapor. A vapor recovery device 1 having: a pump 5 disposed on a pipe 4 branched from a vent pipe 3, one end of which being connected to an underground tank 2, to suck a fuel oil vapor V in the underground tank; a condenser 6 connected, on the branch pipe, to a downstream side of the pump to condense the fuel oil vapor; and a plurality of adsorption/desorption towers 7a, 7b, 8a, 8b connected, on the branch pipe, to a downstream side of the condenser in series to adsorb/desorb fuel oil vapor fed from the condenser. One of the adsorption/desorption towers can be arranged above another one of remaining adsorption/desorption towers, and the pump may be fixed in a housing 30 through a bottom face and a side face of the pump and elastic bodies 32, 33.