A modular extraction column comprising: end blocks respectively having a flange on one side; a body block comprising a plurality of column modules stacked on each other, the plurality of column modules being coupled to the flanges of the end blocks in a surface contact manner, each of the plurality of column modules comprising a first module flange and a second module flange provided on opposite ends and an accommodating portion provided in an inner portion to have a predetermined area, wherein the plurality of column modules are coupled to each other such that the first module flange of one column module among the plurality of column modules faces the second module flange of an adjacent column module among the plurality of column modules; and an inner structure received in the accommodating portions of the plurality of column modules to distribute a fluid, characterized in that each of the plurality of column modules have a quadrangular cross-section in a direction perpendicular to a longitudinal direction thereof and the end blocks and the body block communicate with each other, the accommodating portion of each of the plurality of column modules having a quadrangular cross-section in a direction perpendicular to a longitudinal direction thereof, wherein each of the plurality of column modules (2100 further comprises a cover disposed adjacent to an open area formed in one side of the each column module , the cover being detachably coupled to a predetermined portion of the each column module to open and close the open area , wherein the inner structure comprises a cartridge introduced through the open area and seated in the accommodating portion communicating with the open area . end blocks respectively having a flange on one side; a body block comprising a plurality of column modules stacked on each other, the plurality of column modules being coupled to the flanges of the end blocks in a surface contact manner, each of the plurality of column modules comprising a first module flange and a second module flange provided on opposite ends and an accommodating portion provided in an inner portion to have a predetermined area, wherein the plurality of column modules are coupled to each other such that the first module flange of one column module among the plurality of column modules faces the second module flange of an adjacent column module among the plurality of column modules; and an inner structure received in the accommodating portions of the plurality of column modules to distribute a fluid, characterized in that each of the plurality of column modules have a quadrangular cross-section in a direction perpendicular to a longitudinal direction thereof and the end blocks and the body block communicate with each other, the accommodating portion of each of the plurality of column modules having a quadrangular cross-section in a direction perpendicular to a longitudinal direction thereof, wherein each of the plurality of column modules (2100 further comprises a cover disposed adjacent to an open area formed in one side of the each column module , the cover being detachably coupled to a predetermined portion of the each column module to open and close the open area , wherein the inner structure comprises a cartridge introduced through the open area and seated in the accommodating portion communicating with the open area . <EOS>