A method for manufacturing solid oxide fuel cells, which includes preparing an electrical connection material, preparing a stacked body by stacking a plurality of power generation cells with the electrical connection material interposed therebetween, and firing the stacked body while applying pressure on the stacked body in a direction of stacking the power generation cells. The electrical connection material includes a ceramic porous layer and a ceramic dense layer stacked on the ceramic porous layer, the ceramic dense layer having a porosity lower than a porosity of the ceramic porous layer.