抑制该水在气体通道积累一段时间，所以能够抑制发电效率的降低是由于在膜电极组件的干燥。 形成面对所述膜电极组件13，多个槽状延伸的彼此平行和气体流路25，两个气体流路25相邻的一个的表面上形成板22的气体流路 形成分别位于之间的内突出部23，和一个的后表面上形水通路26的多个槽。 内突起23，该气体流路25和水通道26和连通部27，28的内凸部23，以通过利用与所传送的毛细作用被引入到水通道26和水气通路25 有多个在拉伸方向L形成。 上游的气体的流动方向上的，从而使引入的水向上游侧，由于利用毛细管作用连通部28的水流路26被抑制，面向膜电极组件13中的通信部分28层的面 形成为比下游侧的连通部27的开口面积扩大的开口的放大区域的开口面积。 点域1

The present invention while suppressing the water is accumulated in the gas passage, it is possible to suppress a decrease in power generation performance due to drying of the membrane electrode assembly.
A gas flow path forming plate 22 is formed in a surface facing the membrane electrode assembly 13, a plurality grooves shaped extending parallel to each other and the gas flow passage 25, the two gas flow paths 25 adjacent to each other a plurality of grooves shaped water passage 26 formed on the back surface of the inner protrusions 23 located respectively in between and a. The inner protrusion 23, the gas flow passage 25 and the water passage 26 and the communicating portion 27, 28 inner protrusion 23 to be introduced into the water passage 26 of water gas passage 25 by utilizing the capillary action communicated with the and a plurality formed in the extending direction L of. On the upstream side of the flow direction of the gas, so that the introduction of water into the upstream communication portion 28 water passage 26 using a capillary action due is suppressed, facing the membrane electrode assembly 13 in the communication portion 28 faces the opening area of ​​opening enlarged enlargement area than the opening area of ​​the downstream side communicating portion 27 is formed on.
.FIELD 1