The present invention relates to a vacuum sewage pipe (2) which is installed on one side of a river (1) and which is connected to an upstream side vacuum sewage pipe (2) for preventing a fall of a vacuum furnace due to a head when the obstacle The downstream side vacuum sewage pipe 3 installed on the side of the river 1 is connected by the water pipe 4 and the vent pipe 5 which pass downward from the lower side of the river 1. The sewage in the upstream-side vacuum sewage pipe 2 flows into the vacuum sewage pipe 3 at the downstream side by the water pipe 4.;The degree of vacuum transmitted to the vacuum sewage pipe 3 downstream from the vacuum station is transmitted to the upstream side vacuum sewage pipe 2 through the vent pipe 5 with almost no decrease.
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