1. A liquid cooling server that cools a heat generating component via a liquid cooling medium, the liquid cooling server comprising:a chassis configured to include a unit case housing portion;
a unit case configured to be allowed to move in a first direction to be inserted in and pulled out from the unit case housing portion and include the heat generating component and a portion to be cooled;
a cooling plate configured to be provided to the chassis, oppose the unit case housing portion in a second direction perpendicular to the first direction, and include a flow path through which the cooling medium flows;
a metal portion configured to be provided to a first member which is either one of the cooling plate and the portion to be cooled, the metal portion including a plurality of first protrusions which protrude in the second direction towards a side of the unit case housing portion, the plurality of first protrusions being arranged in the first direction; and
a heat transfer body configured to be provided between the metal portion and the first member in the second direction, the heat transfer body having elasticity.