Developing the texture of ceramics is one of the effective ways for improving properties. Although the magnetic susceptibility of nonmagnetic materials is very small, there is a possibility to control the crystal orientation using a high magnetic field due to a magnetic anisotropy. In this study, Si3N4 ceramics were manufactured by a slip‐casting process under high magnetic field and pressureless sintering. The texture of Si3N4 ceramics was studied using X‐ray diffraction and scanning electron micrographs of polished and plasma‐etched specimens. It has been found that most of the a,b‐axes texture of β‐Si3N4 grains aligned to the magnetic field direction.