PROBLEM TO BE SOLVED: To provide a low cost ethanol vapor generation type deoxidizer which enables a foreign matter examination by a metal detector, has a small volume of content powder, can suppress deterioration of deoxidizing performance and quality-maintaining performance of food even when a time is needed from when package for storing is opened to when it is placed in a food package, and can suppress generation of metallic smell and an acetaldehyde gas, and to provide a food preservation method using the ethanol vapor generation type deoxidizer.SOLUTION: The ethanol vapor generation type deoxidizer comprises glycerin, water, an alkaline material, silica, ethanol, and a transition metal or a compound thereof, where a value obtained by dividing Oken type air permeability (second/100 mL) by a transmission area of a packaging material per 1 g of content powder (cm/g) is 250 to 1,500. Also provided is a food product preservation method comprising a step of placing the ethanol vapor generating type deoxidizer
