Combined Cell Structure for Solid Oxide Fuel Cell

There is provided a combined cell structure for a solid oxide fuel cell provided with a structure in which a plurality of tube-type or flat-tube-type solid oxide fuel cell are combined with one another in series in a longitudinal direction. The combined cell structure includes first and second cells each having a first electrode, a second electrode and an electrolyte layer interposed between the first and second electrodes; a first support member for passing through a hollow portion of the first cell; and a second support member for passing through a hollow portion of the second cell. In the combined cell structure, one ends of the first and second support members facing each other are fixedly combined with each other. Accordingly, the first and second cells are connected to each other in the flow direction of a reactant.