To provide an orifice member wherein occurrence of turbulence is suppressed, and breakage and the like are prevented from occurring in the pipe line.
The orifice member 1 is placed in the pipe line 2 wherein fluid is passed. In the orifice member 1, a plurality of peripheral holes 3 are made around the central axis C1 of the pipe line 2 to gradually approach to each other into the downstream so as to join together on the central axis C1 of the pipe line 2, and a confluent hole 5 is provided extendedly downward from the confluence 4 of the peripheral holes 3 on the central axis C1 of the pipe line 2. The fluid comes in the plurality of peripheral holes 3 to join together in the confluence 4 to flow out of the one confluent hole 5. Thus, the fluid is straighten to suppress occurrence of turbulent flows.
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