HUMIDIFIER

A humidifier includes a humidification part through which supply gas, supplied to a fuel cell, and discharge gas, discharged from the fuel cell, pass, and a water vapor permeable membrane arranged onthe humidification part, and a separation part arranged on a part of a passage for the discharge gas upstream of the humidification part. The separation part is configured to separate a liquid from the discharge gas and is connected in series to the humidification part. 加湿器包括：加湿部，供应到燃料电池的供应气体和从燃料电池排出的排出气体通过加湿部；和水蒸气可透膜，其配置于加湿部；和分离部，其配置于用于排出气体的通道的位于加湿部上游的部分。分离部被构造成从排出气体分离液体，并且与加湿部串联连接。