PROBLEM TO BE SOLVED: To provide a liquid chemical set and a liquid chemical administration method, capable of easily and quickly switching a liquid chemical supply part and not exposing a liquid chemical.SOLUTION: The liquid chemical set includes: a plurality of liquid chemical supply parts, each of which has a bottle needle to be punctured to a liquid chemical discharge part of a liquid chemical bag and a liquid supply tube whose one end is connected to a connection part a liquid chemical integration part connected to all the other ends of liquid supply tubes and provided with a liquid discharge port and a liquid discharge tube whose one end is connected to the liquid discharge port and other end is connected to an indwelling device. Each of the liquid chemical supply parts includes a flow path opening/closing part provided in the middle of the liquid supply tube to open and close the distribution of the liquid chemical, the liquid chemical integration part includes a plurality of liquid supply ports to which the other ends of the respective liquid supply tubes of the plurality of liquid chemical supply parts are connected, and one liquid discharge port, and a filter unit having an air vent filter and a liquid chemical filter is provided integrally with the liquid chemical integration part or in the middle of the liquid discharge tube.COPYRIGHT: (C)2013,JPO&INPIT【課題】容易かつ迅速に薬液供給部を替えられ、かつ薬液の暴露が生じない薬液セット及び薬液投与方法を提供する。【解決手段】薬液バッグの薬液排出部に穿刺される瓶針と、接続部に一端が接続される給液チューブと、を備えてなる複数の薬液供給部と、前記給液チューブの他端の全てに接続され、且つ、排液口を有する薬液統合部と、一端が前記排液口に接続され、他端が留置器具に接続された排液チューブと、を備え、薬液供給部が、給液チューブの途中に設けられて薬液の流通を開閉する流路開閉部を備え、薬液統合部が、複数の薬液供給部のそれぞれの給液チューブの他端が接続される複数の給液口と、一つの排液口を備え、エアベントフィルター及び薬液フィルターを備えたフィルターユニットが、前記薬液統合部と一体に、もしくは前記排液チューブの途中に設けられている薬液セットとする。【選択図】図1