A keypad assembly having three-dimensional patterns includes a bottom layer, a light-guiding plate, a pattern layer, a coating layer and a surface layer. The light-guiding plate is overlapped on the bottom layer. The pattern layer is provided on the light-guiding plate. A plurality of three-dimensional patterns is provided on the pattern layer. The coating layer is coated on the upper surface of the pattern layer. The surface layer is overlapped on the coating layer. The surface layer is formed with a plurality of keycaps to correspond to the three-dimensional patterns. Via the above arrangement, patterns such as characters, symbols or icons can be displayed in the keycaps in a three-dimensional manner, thereby increasing recognition and visual effect.