To provide a sanitary napkin which is excellent in water permeability and breathability, hard to be stuffed during use, hygienic, highly repulsive and excellent in cushioning property and body pressure dispersibility, so that back pain, bed sores, etc. hardly occur even when used continuously Provides a chair bed mattress which is less burdensome to the user, can clean and replace the inner cushioning material as necessary, and can maintain a comfortable sleeping feeling for a long period of time.SOLUTION: A linear material molded into a solid or a hollow shape with a synthetic resin is bent to form either one or both of a loop and a curl, and the adjacent linear members are brought into contact entanglement with each other to gather and gather A cushioning material 12 formed of a three-dimensional net-like structure formed on the cushioning material 12, and a bag body 11 formed of a mesh cloth having water permeability and air permeability and accommodating the cushioning material 12, A side cushion material 16 and a lower body side cushion material 17, and the density of the upper body side cushion material 16 is smaller than the density of the lower body side cushion material 17.BACKGROUND OF THE INVENTION【課題】透水性、通気性に優れ、使用中に蒸れ難く、衛生的であり、高反発でクッション性、体圧分散性に優れるため、連続使用しても、腰痛や床ずれ等が発生し難く、使用者の負担が少なく、必要に応じて内部のクッション材の洗浄、交換が可能で、長期間にわたって快適な寝心地を維持できるチェアベッド用マットレスを提供する。【解決手段】合成樹脂で中実又は中空に成形された線状材が屈曲してループ及びカールのいずれか一方又は双方を形成し、隣接する線状材同士が接触絡合することにより集合して形成された三次元網状構造体からなるクッション材12と、透水性及び通気性を有するメッシュ生地で形成され、クッション材12が収容される袋体11とを有し、クッション材12は、上半身側クッション材16と、下半身側クッション材17に分割されており、上半身側クッション材16の密度が、下半身側クッション材17の密度より小さい。【選択図】図1
