PROBLEM TO BE SOLVED: To provide a freezing device and a freezing method capable of keeping freshness by freezing from the surface of a food to the inside thereof in bulk.SOLUTION: A freezing device includes: a first cold air blow unit 10 capable of blowing cold air a second cold air blow unit 11 provided at a position opposite to the first cold air blow unit 10, and capable of cold air toward the first cold air blow unit 10 and a control unit 16 capable of changing so that the air blow amounts of the first cold air blow unit 10 and second cold air blow unit 11 are different, and alternately changing the side between the air blow amounts of the first cold air blow unit 10 and second cold air blow unit 11.
