Ethyl cellulose (EC) was mixed with terpineol and conductive ceramic La 0.6 Sr 0.4 Ti 0.3 Fe 0.7 O 3−δ to prepare pastes with different EC content. Viscosity of the vehicles was found to increase with EC content, and the intrinsic viscosity, hydrodynamic radius, and effective sphere of EC in terpineol were estimated to be 0.07L/g, 78.8nm, and 0.06L/g, respectively. For a ceramic paste of 70wt% powder and vehicle, shear thinning properties were observed for pastes of 0 and 1wt% EC. For EC contents above 3wt%, the pastes become Newtonian-like behavior and EC was considered to act effectively as a dispersant. Screen printing of the pastes was carried out. The relative densities of the sintered films were as low as 51.7% for the 0wt% EC paste, but increased to 67.6% for the 3wt% EC paste. The high density observed for the 3wt% EC paste was due to particles being well dispersed, which was also expected from the rheological results.