Provided is a method of assessing a potential for development of Dravet syndrome with high accuracy, and use thereof. The method according to the present invention of assessing a potential for development of Dravet syndrome includes, with use of a sample taken from a subject, detecting whether or not a mutation is on α-subunit type 1 of voltage-gated sodium ion channel NaV1.1, and detecting whether or not a mutation is on α-subunit type 1 of voltage-gated calcium ion channel CaV2.1.
