A fuel cell device, comprising: a fuel cell module comprising a fuel cell and a reformer which steam-reforms a raw fuel; a condensate water recovery flow path which recovers water contained in an exhaust gas discharged from the fuel cell module as condensate water; a condensate water recovery device which stores the condensate water flowing through the condensate water recovery flow path; and a reforming water supply flow path which supplies the condensate water stored in the condensate water recovery device to the reformer, the condensate water recovery device comprising a first ion exchange container which contains an ion exchange resin; a first storage container which stores the condensate water having passed through the first ion exchange container; and a second storage container communicating with the first storage container, wherein an upstream end of the reforming water supply flow path is connected to the second storage container, the first storage container being a bottomed container comprising a upper side opening, the first ion exchange container being disposed inside the first storage container with a space from the first storage container, and being attachable to and detachable from the first storage container through the upper side opening, the first storage container comprising, at a lower portion thereof, a third water supply port which discharges the condensate water therein toward the second storage container, the second storage container comprising, at a lower portion thereof, a water receiving port which receives the condensate water inside the first storage container, the third water supply port and the water receiving port being connected to each other by a connection pipe, in the first ion exchange container, the condensate water recovery flow path being not in communication with the upper side opening of the first storage container, the first storage container comprising an air outlet which vents air therein to the second storage container, at an upper portion of the first storage container, the second storage container comprising an air inlet which introduces the air inside the first storage container thereto, the air outlet and the air inlet being connected to each other by a connection pipe. a fuel cell module comprising a fuel cell and a reformer which steam-reforms a raw fuel; a condensate water recovery flow path which recovers water contained in an exhaust gas discharged from the fuel cell module as condensate water; a condensate water recovery device which stores the condensate water flowing through the condensate water recovery flow path; and a reforming water supply flow path which supplies the condensate water stored in the condensate water recovery device to the reformer, the condensate water recovery device comprising a first ion exchange container which contains an ion exchange resin; a first storage container which stores the condensate water having passed through the first ion exchange container; and a first ion exchange container which contains an ion exchange resin; a first storage container which stores the condensate water having passed through the first ion exchange container; and a second storage container communicating with the first storage container, wherein an upstream end of the reforming water supply flow path is connected to the second storage container, the first storage container being a bottomed container comprising a upper side opening, the first ion exchange container being disposed inside the first storage container with a space from the first storage container, and being attachable to and detachable from the first storage container through the upper side opening, the first storage container comprising, at a lower portion thereof, a third water supply port which discharges the condensate water therein toward the second storage container, the second storage container comprising, at a lower portion thereof, a water receiving port which receives the condensate water inside the first storage container, the third water supply port and the water receiving port being connected to each other by a connection pipe, in the first ion exchange container, the condensate water recovery flow path being not in communication with the upper side opening of the first storage container, the first storage container comprising an air outlet which vents air therein to the second storage container, at an upper portion of the first storage container, the second storage container comprising an air inlet which introduces the air inside the first storage container thereto, the air outlet and the air inlet being connected to each other by a connection pipe.