To provide a fluid for a medical device which can control the rate of outflow of a first fluid and a second fluid with high accuracy, can set the accuracy of each component relatively low, is easy to assemble, can be manufactured inexpensively with a simple configuration A flow control mechanism and an incubator including the same are also provided.SOLUTION: A fluid flow rate control mechanism for a medical device includes a tubular case having an internal space and an operating member capable of reciprocating in a longitudinal direction in the internal space, and the tubular case comprises a tubular case A first introion port, a second introion port of a second fluid, and an outflow port capable of flowing out the first fluid and the second fluid in the internal space to the outside, wherein the operation member divides the internal space into a first fluid Into a first space portion into which the first fluid is introd and a second space portion into which the second fluid is introd, and a part of the outlet port is divided into a first outlet port through which the first fluid flows out and a remainder of the outlet port And a second outflow port through which the second fluid flows out, wherein the operating member is reciprocable in accordance with a differential pressure between the pressure of the first fluid and the pressure of the second fluid And is movable.(FIG.【課題】第1流体と第2流体の流出割合を高精度に管理でき、各々の部品の精度を比較的低く設定でき、組み立てが容易で、簡単な構成で安価に製作し得る医療機器用流体流量制御機構及びこれを備える保育器を提供する。【解決手段】医療機器用流体流量制御機構は、内部空間を有する筒形ケースと該内部空間内の長さ方向に往復移動可能な作動部材とを備え、筒形ケースは、第1流体の第1導入口と、第2流体の第2導入口と、内部空間内の第1流体と第2流体とを外部に流出可能な流出口とを有し、作動部材は、内部空間を第1流体が導入される第1空間部と第2流体が導入される第2空間部とに隔てることが可能であり、流出口の一部を第1流体を流出させる第1流出口と流出口の残部を第2流体を流出させる第2流出口とに分割することが可能な第1弁体部を有し、作動部材は第1流体の圧力と第2流体の圧力との差圧に応じて往復移動可能とされる。【選択図】 図6
