A fuel cell, comprising: unit cells each having an anode and a cathode joined together via an electrolyte membrane; a cell stack having a plurality of cells stacked, each of the cells having a said unit cell and a separator provided with an anode fluid channel; and a manifold for supplying an anode fluid to a position which the anode fluid channel of the cell faces, characterized in that the manifold comprises a top plate provided with an introduction port through which the anode fluid is introduced, a bottom plate provided with a plurality of fine openings facing the anode fluid channels, a flow-through space for the anode fluid being formed between an inner surface of the top plate and an upper surface of the bottom plate, and a partition plate present between the top and bottom plates (12, 13) and provided with a communication port, a first space being formed between the top plate and the partition plate and a second space being formed between the partition plate and the bottom plate, wherein: a projection is provided on the upper surface of the bottom plate at a position of the communication port in the partition plate, a block group comprising a plurality of individual blocks spaced apart from one another to form a plurality of channels for dispersing the anode fluid, which has been supplied from the communication port, to the fine openings is provided on the upper surface of the bottom plate between said projection of the communication port and the fine openings, and the arrangement is such that the anode fluid supplied from the communication port is brought into contact with the projection on the upper surface of the bottom plate and its flow velocity is lowered, and the anode fluid having the flow velocity lowered flows through the channels of the block group, and is dispersed to the fine openings. unit cells each having an anode and a cathode joined together via an electrolyte membrane; a cell stack having a plurality of cells stacked, each of the cells having a said unit cell and a separator provided with an anode fluid channel; and a manifold for supplying an anode fluid to a position which the anode fluid channel of the cell faces, characterized in that the manifold comprises a top plate provided with an introduction port through which the anode fluid is introduced, a bottom plate provided with a plurality of fine openings facing the anode fluid channels, a flow-through space for the anode fluid being formed between an inner surface of the top plate and an upper surface of the bottom plate, and a partition plate present between the top and bottom plates (12, 13) and provided with a communication port, a first space being formed between the top plate and the partition plate and a second space being formed between the partition plate and the bottom plate, wherein: a projection is provided on the upper surface of the bottom plate at a position of the communication port in the partition plate, a block group comprising a plurality of individual blocks spaced apart from one another to form a plurality of channels for dispersing the anode fluid, which has been supplied from the communication port, to the fine openings is provided on the upper surface of the bottom plate between said projection of the communication port and the fine openings, and the arrangement is such that the anode fluid supplied from the communication port is brought into contact with the projection on the upper surface of the bottom plate and its flow velocity is lowered, and the anode fluid having the flow velocity lowered flows through the channels of the block group, and is dispersed to the fine openings. a projection is provided on the upper surface of the bottom plate at a position of the communication port in the partition plate, a block group comprising a plurality of individual blocks spaced apart from one another to form a plurality of channels for dispersing the anode fluid, which has been supplied from the communication port, to the fine openings is provided on the upper surface of the bottom plate between said projection of the communication port and the fine openings, and the arrangement is such that the anode fluid supplied from the communication port is brought into contact with the projection on the upper surface of the bottom plate and its flow velocity is lowered, and the anode fluid having the flow velocity lowered flows through the channels of the block group, and is dispersed to the fine openings.