Magnesium oxide granules which are excellent in dissolution property, are palatable, rarely leave any rough feeling in the oral cavity and have a good color in appearance.The granules comprise magnesium oxide particles which are represented by the following formula (1) and have an average secondary particle diameter of 0.1 to 25 µm and an apparent specific volume of 3 to 20 ml/g, a sugar alcohol and a disintegrating agent. (Mg2+1-xZn2+x) O (1)(In the formula, X is a numeral of 0 to 0.02.)
