22 x30.5x2The purpose of the present invention is to provide: a deoxidizing agent for edible oils which has excellent deoxidizing capability and a method for regenerating a used edible oil using the deoxidizing agent. The present invention relates to a deoxidizing agent for edible oils which comprises particles of magnesium hydroxide containing a carbonate group or a burned product of the particles wherein the magnesium hydroxide containing a carbonate group is represented by formula (1) and each of the particles has a specific surface area of 80 400 m/g as measured by a BET method. Mg(OH)(CO)�mHO (1) In the formula x and m fulfill the following requirements: 0.02 = x = 0.7 and 0 = m = 1.