To provide a drying method and a drying device, not allowing generation of failure such as unevenness due to drying or blowing in a width direction without deteriorating coating film quality even when a drying width is 1 m or above.

This coating film drying device drying a strip-like support body having a drying film while conveying it after applying a coating liquid onto the continuously conveyed strip-like support body to form the coating film has at least one drying zone. The drying zone is disposed with: at least one gas supply box having a blowoff port for supplying gas to the coating film, in a position opposite to the coating film; and at least one gas discharge box having a gas recovery port for discharging the gas, in a position opposite to the coating film.