Abstract: A dehumidifier, and a lamp for a vehicle including the same, can include a dust cover including first communication hole therein, an absorbent cover coupled to the dust cover, wherein a desiccant is accommodated between the dust cover and the absorbent cover, wherein the absorbent cover includes at least one second communication hole therein corresponding to the first communication hole, and a valve configured to selectively open the first communication hole and the second communication hole through a first bracket and a second bracket, which are operated and moved by a shape memory alloy of the valve that is deformed by a temperature difference between an inside of the dust cover and an outside of the dust cover.