We describe the preparation of a printable ink composed of single-walled carbon nanotubes (SWNTs) and a curable diacrylate monomer (R712), as well as its cured films (SWNT/polymer composite), to evaluate the thermoelectric properties including the Seebeck coefficient, electrical conductivity, and thermal conductivity. The anisotropy of the thermal conductivity was especially investigated and in-plane ZT of the SWNT/polymer composite was determined for the first time. Finally, we have succeeded in printing the patterned array on polyimide film using this ink.