NOVELTY - The solid oxide fuel cell has single cells (2) obtained by laminating a fuel electrode (3), a solid electrolyte film (4) formed on a plate material of fuel electrode, an air electrode film (5) containing porous material, on film (4), and an interconnector film (6) formed on other surface of electrode. Cells are connected in series by applying electroconductive paste between films (5,6). Paste contains air pole material powder which is material powder of air electrode film, a thickener and a moisturizer containing at least one type of organic solvent.    USE - Solid oxide fuel cell used as power supply for thermal power generation, generator for motor vehicles, and domestic co-generation.    ADVANTAGE - The solid oxide fuel cell suppresses electrical contact resistance of joint surfaces between single cells. The viscosity of electroconductive paste is maintained and adhesiveness of single cells is improved.    DETAILED DESCRIPTION - The solid oxide fuel cell has several single cells (2) obtained by laminating a fuel electrode (3), a solid electrolyte film (4) formed on one or both surface of a plate material of fuel electrode, an air electrode film (5) containing a porous material, formed on solid electrolyte film, and an interconnector film (6) formed on other surface of fuel electrode. The single cells are connected in series by applying electroconductive paste between air electrode film and interconnector film. The electroconductive paste contains air pole material powder which is material powder of air electrode film, a thickener and a moisturizer containing at least one type of organic solvent. The thickener is carboxymethylcellulose. The moisturizer is propylene glycol. The air pole material powder contains yttria stabilized zirconia or scandia stabilized zirconia.    DESCRIPTION OF DRAWING(S) - The drawing shows the cross sectional view of solid oxide fuel cell.    Stack (1)    Single cell (2)    Fuel electrode (3)    Solid electrolyte film (4)    Air electrode film (5)    Interconnector film (6)