(57) [summary] to [purpose] bladder and pinholes, it does not cause a crack. [Configuration] by arranging the bladder 3 into the shell 1, and then partitioning the shell 1 into two chambers, one chamber as well as the pressure chamber 8, the other chamber the inflow chamber 9 which fluid may flow In the hydraulic accumulators, raised part 1 to the pressure chamber 8 The elastic member 12 having one is provided, the raised part 11 The valve stem on the inclined surface 13 of the 2 and the gas filling port 4 communicating with Opening the and ring 10 is embedded in a portion of the gas filling port 4 out of the raised part 11 is open.
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