PROBLEM TO BE SOLVED: To provide a novel-structure active-type fluid cell mattress preventing rapid deformation of support cells constituting a body-pressure acting surface and improving sleeping comfort by stabilization of the body-pressure acting surface, and a control method thereof.SOLUTION: The fluid cell mattress includes a plurality of cell units 26 constituted by communicating a plurality of fluid chambers 40 of support cells 30 to one another by first communication pathways 46, where the respective cell units 26 are connected with auxiliary cells 28 whose volume is changeable by including auxiliary fluid chambers 60 therein, and the fluid chambers 40 of the support cells 30 and the auxiliary fluid chambers 60 of the auxiliary cells 28 are communicated to one another by second communication pathways 66. A cross section of a pathway of at least one of the first communication pathway 46 and the second communication pathway 66 is configured to be variable according to passage internal pressure. A pressure regulator 70 generating move of the fluid between the fluid chambers 40 and the auxiliary fluid chambers 60 via the second communication pathways 66 is controlled on the basis of a detection result of a pressure sensor 16 for detecting pressure acted on a body-pressure acting surface 13.SELECTED DRAWING: Figure 1【課題】体圧作用面を構成する支持セルの急激な変形が防止されて、体圧作用面の安定化による寝心地などの改善が図られる、新規な構造の能動型流体セル式マットレスとその制御方法を提供すること。【解決手段】複数の支持セル３０の流体室４０を第一の連通路４６で相互に連通させて構成したセルユニット２６が複数設けられていると共に、各セルユニット２６には内部に補助流体室６０を備えて容積可変とされた補助セル２８が接続されて、支持セル３０の流体室４０と補助セル２８の補助流体室６０が第二の連通路６６で相互に連通されており、第一の連通路４６と第二の連通路６６の少なくとも一方の通路断面積が通路内圧に応じて可変とされている一方、流体室４０と補助流体室６０の間で第二の連通路６６を通じた流体の移動を生ぜしめる調圧装置７０が、体圧作用面１３への作用圧力を検出する圧力センサ１６の検出結果に基づいて制御されるようにした。【選択図】図１
