A control panel window assembly of a washing/drying machine includes a control panel with a window hole on which a display part is mounted, wherein a control panel window is mounted at the window hole, and the control panel window includes: a display window formed to cover a portion of the display part; a button portions including a plurality of button portions formed at both sides of the display window. The washing/drying machine having the control panel window assembly can meet the needs of users who prefer a washing/drying machine in harmony with the cabinet made of stainless steel and provide a high-end quality image.