A power conversion device comprising: a three-phase conversion circuit in which each of upper arm elements which are switching elements in an upper arm and each of lower arm elements which are switching elements in a lower arm are provided for each of three phases; and a switching control unit which alternately switches between an upper arm period of holding one of the upper arm elements ON and a lower arm period of holding one of the lower arm elements ON, wherein the switching control unit switches between the upper arm period and the lower arm period, based on an integrated value of power which is calculated by integrating a power pattern which is set beforehand.