An information processing device includes: a device main body including a cooling plate; and a heat generating unit including a heat generating element and a contact plate thermally coupled to the heat generating element, the heat generating unit being detachable from the device main body, wherein the cooling plate includes a heat transfer spring configured to come into contact with the contact plate, the heat transfer spring includes a spring portion configured to come into elastic contact with the contact plate, and a thermally conductive portion disposed between a surface of the spring portion on an opposite side from a contact surface of the spring portion that comes into contact with the contact plate, and the cooling plate.