The 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 m2/g as measured by a BET method. Mg(OH)2-x(CO3)0.5x·mH2O (1) In the formula, x and m fulfill the following requirements: 0.02 ≤ x ≤ 0.7 and 0 ≤ m ≤ 1.Se describe un agente desoxidante para aceites comestibles, que comprenden partículas de hidróxido de magnesio que contiene el grupo carbonato, representadas por la siguiente fórmula (1) y que tienen un área superficial específica BET de 80 a 400 m2/g o partículas horneadas del mismo, y un método de regeneración de un aceite comestible usado, mediante el empleo del agente desoxidante. Mg(OH)2-x(CO3)0.5.x•mH2O (1) (1) (x satisface 0.02 = x = 0.7 y 0 = m = 1. El agente desoxidante anterior tiene excelente capacidad desoxidante.
