Chemical agent filter replacing device

The purpose of the present invention is to provide a chemical agent filter replacement device in which, when a filter housing and a filter head are coupled, the mutually facing surfaces of the filter housing and the filter head are in a horizontal state. In order to achieve this purpose, the chemical agent filter replacement device comprises: a filter assembly fixing part for fixing a filter assembly, the filter assembly comprising a filter housing in which a filter element for filtering a chemical agent is accommodated, and a filter head coupled to an open side of the filter housing; a filter housing removal module that moves the filter housing to remove the filter housing from the filter assembly or to couple the removed filter housing to the filter assembly; wherein the filter housing attachment/detachment module is provided with at least one elastic member, and the elastic member causes an elastic force to act on a contact surface between the filter housing and the filter head when the filter housing is m