PROBLEM TO BE SOLVED: To provide an odor removal agent, an odor removal device with the odor removal agent, and a refrigerator with the odor removal device, which can eliminate an odor in a short time without limiting an installation site even under low temperature such as in a refrigerator and without having an affect on the human body.SOLUTION: An odor removal agent contains a volatile component 2a, and a controlled-release membrane 1 capable of controlling a transmission speed of the volatile component 2a under low temperature.