PROBLEM TO BE SOLVED: To provide a neck pillow capable of positively maintaining an S-shaped curve when a user is in a reclining posture or such a decubitus posture as to sit on a chair, a wheelchair, a dental treatment chair or the like, and a neck pillow system.SOLUTION: A neck pillow includes a neck supporting part 102 that is formed in a surface shape curved almost along a natural curve of a back surface of a neck part 11, and a pair of swelling parts 104 that are positioned on both the sides of the neck supporting part 102, respectively, and formed in such a shape as to abut on a lower part of a mastoid process 1 of a head 10 and a lower part of an external occipital protuberance 2. The neck supporting part 102 is extended from a first cervical vertebra C1 to a seventh cervical vertebra C7.SELECTED DRAWING: Figure 6COPYRIGHT: (C)2016,JPO&INPIT【課題】リクライニング姿勢、椅子、車椅子、歯科治療椅子などに着座した臥位姿勢のときにS字カーブを積極的に維持できる首枕及び首枕システムを提供する。【解決手段】頚部11の背面の自然なカーブにほぼ沿った湾曲した表面形状に形作られた頚部支持部102と、頚部支持部102の両側に夫々位置し、頭部10の乳様突起1の下部、外後頭隆起2の下部に当接する形状に形作られた一対の隆起部104とを有し、頚部支持部102が第1頸椎C1から第7頸椎C7まで延びている。【選択図】図6
