NOVELTY - Fuel cell stack (10) comprises coolant flow guide member for recirculating coolant in coolant outlet manifold (15) to coolant inlet manifold (13) and back through predetermined cells (11), in which coolant being heated during passing through predetermined cell is recirculated to low temperate cells adjacent to end plate (19).    USE - Fuel cell stack used for vehicles. Uses include but are not limited to passenger automobiles including sports utility vehicles, buses, trucks, commercial vehicles, watercraft including boats and ships, and aircraft; and hybrid vehicles, electric vehicles, plug-in hybrid electric vehicles, hydrogen-powered vehicles and other alternative fuel vehicles.    ADVANTAGE - The fuel cell stack has improved temperature uniformity. Specifically, it can reduce variation in temperature distribution of whole cells by simple change in structure of coolant inlet and outlet manifolds without using conventional insulator.    DETAILED DESCRIPTION - The fuel cell stack preferably comprises multiple cells forming cell stack and first and second coolant flow guide members. The coolant flow guide member of coolant outlet manifold comprises vane (16) which is provided at end of coolant channel (11b) of cell, through which coolant is recirculated, in coolant outlet manifold to guide portion of coolant flowing through coolant outlet manifold to be introduced into coolant channel of cell. The vane is provided in coolant channels of several predetermined cells, through which coolant is recirculated, such that coolant is recirculated through cells in which vane is provided, coolant flow guide member of coolant inlet manifold, cells in which vane is not provided, and coolant outlet manifold. The coolant flow guide member of coolant inlet manifold comprises airtight flow member (14) which is provided to seal end periphery of coolant channels of cells. The airtight flow member integrally seals end periphery of coolant channels of whole cells.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of fuel cell stack configuration.    Fuel cell stack (10)    Cells (11)    Coolant channel (11b)    Coolant inlet manifold (13)    Airtight flow member (14)    Coolant outlet manifold (15)    Vane (16)    Current collector (18)    End plate (19)