According to an embodiment of the present invention, a gas / liquid pump can be configured through application of a two-phase cooling 
system, advantageously maximizing the 
cooling efficiency. To this end, particularly, an embodiment of the present invention may comprise an electronic part cooling device having a gas / liquid pump, comprising: an 
impeller positioned on a gas / liquid containing portion that contains a gas / liquid; a motor 
stator positioned on an outside isolated from the gas / liquid containing portion so as to transfer driving force to the 
impeller; a sealed injection cover having an 
impeller shaft formed on one side thereof so as to protrude toward the center of the gas / liquid containing portion such that the impeller is inserted therein, the sealed injection cover having a motorstator 
insertion rod formed on the other side thereof so as to protrude from an axis of the impeller shaft toward the center of the outside such that the motor 
stator is inserted therein, the sealed injection cover having an upper plate formed to expand from a periphery of the motor 
stator insertion rod such that the impeller and the motor stator are isolated from each other, and the sealed injection cover having an entrance and an exit formed on a side surface of the upper plate such that the gas / liquid flows in and out through the same, respectively; a 
heat transfer base thermally bonded orattached to the lower portion of the impeller along an edge of the upper plate such that the gas / liquid containing portion is formed; an inflow 
pipe thermally bonded or attached to the entrance such that the gas / liquid flows in through the same; an outflow 
pipe thermally bonded or attached to the exit such that the gas / liquid flows out through the same; and a condensing portion positioned betweenthe inflow 
pipe and the outflow pipe so as to condense the gas in the gas / liquid, wherein a vacuum is formed in an inner space defined by a close loop extending through the gas / liquid containing portion, the inflow pipe, the outflow pipe, and the condensing portion.