PROBLEM TO BE SOLVED: To provide a liquid waste treatment apparatus which can start suction of liquid waste after a bag body in a bottle is fully inflated because, by the invention, the degree of freedom of changing volume is large and, after a space formed by a bottle, a bag body, and a lid body is first made a negative pressure state inside, the bag body can be made a negative pressure state inside.SOLUTION: The liquid waste treatment apparatus is characterized in that it includes: a bag body L for storing liquid waste 27 a suction port 7 for introducing the liquid waste 27 into the bag body L an exhaust port 9 for the purpose of making the bag body L a negative pressure state inside a discharge port 8 which is connectable to the suction port 7 of the adjacent bag body L a stop valve 47 for opening/closing the exhaust port 9 a support block body 31 which supports the bag body L, the stop valve 47, and a bottle M for storing the bag body L a bolt and nut 32 which attachably/detachably connect a plurality of support block bodies 31 to each other when a plurality of bag bodies L are adjoined.
