A control panel assembly of a home appliance enables a planar contact to be made during a thermal fusion of a display panel to a control panel, so that a secure adhesion between the display panel and control panel can be established regardless of design contours of the home appliance. The assembly includes a control panel having a contour according to a design of the home appliance; and a display panel attached to the control panel, wherein a planar contact between the display panel and the control panel is established through a thermal fusion technique. The display panel is provided with a triangular protrusion along rear edge, and the control panel is provided with a recess for receiving the protrusion.