HUMIDIFIER FOR FUEL CELL

A humidifier for a fuel cell is configured to humidify dry air to be supplied to a fuel cell stack with wet air discharged from the fuel cell stack. The humidifier includes a housing provided such that the dry air and the wet air pass therethrough, a moisture transfer member provided in the housing to transfer moisture in the wet air to the dry air, a bypass flow path provided to guide a part of the dry air to bypass the housing, and a flow regulating valve provided to be driven using a pressure difference between the inside and outside of the housing as a power source to adjust a flow rate of the dry air passing through the bypass flow path.