<p>A heat pipe assembly includes a number of heat pipes (1) and a fixing seat (2). Each of the heat pipes (1) includes an evaporating section (10) and at least a condensing section (11). A bottom of the evaporating section (10) of each of the heat pipes (1) is flat and has a flat heat absorbing surface (100). The evaporating sections (10) of each of the heat pipes (1) are parallel to and adjoin with each other, whereby the flat heat absorbing surfaces (100) of the evaporating sections (10) of the heat pipes (1) being coplanar and adjoining with each other. A top surface of the evaporating section (10) of each of the heat pipes (1) has a top edge (101). The fixing seat (2) has an integral structure and combines with the top edge (101) of the evaporating section (10) of each of the heat pipes (1), whereby the heat absorbing surfaces (100) of the evaporating sections (10) of the heat pipes (1) are coplanar and adjoin with each other.</p>
