PROBLEM TO BE SOLVED: To provide a stable and stable lateral position which can give a comfortable height and interval adapted to a small change in lateral posture without giving a feeling of pressure to the chest, abdomen and arm during rest or sleep in lateral position. To provide a body pillow. A lateral lying body pillow 1 having a substantially hexahedral outer shape, in which at least three sides where the lateral lying body pillow intersect each other have sides of different lengths, and a rectangular parallelepiped shape, a trapezoidal hexahedron shape, or a rhomboid hexahedron. A body pillow having a shape close to a shape of a circle or a rhombus/trapezoid, and the outer surface portion of the body pillow for lateral decubitus being composed of a flexible material that is at least temporarily deformable. [Selection diagram] Fig. 5【課題】側臥位での休息あるいは睡眠時に胸部、腹部や腕部の圧迫感を与えず、側臥位姿勢の小変化に適合した快適な高さおよび間隔を持続的に安定して与え得る側臥位用抱き枕を提供すること。【解決手段】外形が略六面体状の側臥位用抱き枕１であって、該側臥位用抱き枕が少なくとも相交わる３辺の長さが異なる辺を有すると共に直方体状又は台形六面体状又は菱形六面体状又は菱形・台形六面体状に近似した形状体であり、該側臥位用抱き枕の外面部が少なくとも一時的に変形可能な柔軟材で構成されていることを特徴とする側臥位用抱き枕。【選択図】図５
