The present invention provides an egg allergy prevention method to be carried out with respect to a human infant, including: a first administration period (first administration step) in which to administer, to an infant, heated egg white protein in an amount of 10 mg to 20 mg per day; and a second administration period (second administration step) which is a period after the first administration period and in which to administer, to the infant, the heated egg white protein in an amount of 65 mg to 90 mg per day.