A hollow fiber membrane module comprising: a housing unit having a first fluid inlet, a first fluid outlet, a second fluid inlet, and a second fluid outlet; and a plurality of cartridges disposed in the housing unit, characterized in that: each of the cartridges comprises a plurality of assembly type cartridge blocks fastened to each other, each of the assembly type cartridge blocks comprises: a body part having a plurality of hollow fiber membranes therein, the body part having a mesh part configured to allow a fluid to be introduced into the body part therethrough; and a fastening part formed on the body part, the assembly type cartridge blocks being fastened to each other by means of the fastening parts thereof, and the fastening part comprises a fastening protrusion on one side of the body part and a fastening recess on the other side of the body part, such that two adjacent assembly type cartridge blocks are fastened to each other by inserting the fastening part of one of the two adjacent assembly type cartridge blocks into the fastening recess of the other thereof. a housing unit having a first fluid inlet, a first fluid outlet, a second fluid inlet, and a second fluid outlet; and a plurality of cartridges disposed in the housing unit, characterized in that: each of the cartridges comprises a plurality of assembly type cartridge blocks fastened to each other, each of the assembly type cartridge blocks comprises: a body part having a plurality of hollow fiber membranes therein, the body part having a mesh part configured to allow a fluid to be introduced into the body part therethrough; and a fastening part formed on the body part, the assembly type cartridge blocks being fastened to each other by means of the fastening parts thereof, and the fastening part comprises a fastening protrusion on one side of the body part and a fastening recess on the other side of the body part, such that two adjacent assembly type cartridge blocks are fastened to each other by inserting the fastening part of one of the two adjacent assembly type cartridge blocks into the fastening recess of the other thereof. each of the cartridges comprises a plurality of assembly type cartridge blocks fastened to each other, each of the assembly type cartridge blocks comprises: a body part having a plurality of hollow fiber membranes therein, the body part having a mesh part configured to allow a fluid to be introduced into the body part therethrough; and a fastening part formed on the body part, the assembly type cartridge blocks being fastened to each other by means of the fastening parts thereof, and the fastening part comprises a fastening protrusion on one side of the body part and a fastening recess on the other side of the body part, such that two adjacent assembly type cartridge blocks are fastened to each other by inserting the fastening part of one of the two adjacent assembly type cartridge blocks into the fastening recess of the other thereof. a body part having a plurality of hollow fiber membranes therein, the body part having a mesh part configured to allow a fluid to be introduced into the body part therethrough; and a fastening part formed on the body part, the assembly type cartridge blocks being fastened to each other by means of the fastening parts thereof, and the fastening part comprises a fastening protrusion on one side of the body part and a fastening recess on the other side of the body part, such that two adjacent assembly type cartridge blocks are fastened to each other by inserting the fastening part of one of the two adjacent assembly type cartridge blocks into the fastening recess of the other thereof.