PROBLEM TO BE SOLVED: To provide a manufacturing method of a flavored egg capable, by flavoring a chicken egg, not only of neutralizing gaminess unique to chicken eggs but also of bestowing, onto the chicken egg, a novel added value of flavor and a flavored egg.SOLUTION: In the provided fundamental manufacturing method of a flavored egg B, a chicken egg A is retained within an atmosphere of a flavoring substance &alpha over a specified period so as to adhere, to the chicken egg A, the flavor of the flavoring substance &alpha. The chicken egg A, furthermore, is retained, together with the flavoring substance &alpha, within a hermetically sealed region, and cold air is circulated within the hermetically sealed region. The chicken egg A and flavoring substance &alpha, furthermore, are retained within a temperature range of 1°C to 20°C, and the chicken egg A and flavoring substance &alpha are retained therein for 24 hours to 120 hours so as to adhere, to the chicken egg A, the flavor emitted from the flavoring substance &alpha based on the breathing function of the chicken egg A.
