Humidifier for fuel cell

A humidifier for fuel cell comprising:

• a membrane housing;
• a partition plate for dividing an inner space of the membrane housing into plural unit spaces;
• plural hollow fiber membranes in each of the unit spaces, each of the hollow fiber membranes disposed in only the unit space corresponding thereto;
• and
• a cover mounted on an end of the membrane housing, the cover including an inlet for introducing unreacted gas of high-humidity discharged from a stack into the membrane housing,
• wherein plural distribution holes are provided in the membrane housing, the distribution holes corresponding to the unit spaces respectively,
• wherein first and second holes are formed in respective portions of the membrane housing, the portions being in contact with the partition plate, and the first and second holes confront each other with the partition plate interposed therebetween,
• wherein the partition plate has a double partition structure having a pass-through passage thereinside such that the first and second holes are in fluid communication with each other, and
• wherein at least one partition of the double partition structure is provided with a window enabling the pass-through passage and the unit space to be in fluid communication with each other such that the unreacted gas of high-humidity introduced into the pass-through passage via the first and second holes can be distributed to the unit space via the window.