Abstract: A key board for a notebook type computer invention includes a switching part (260) disposed between a key frame (210) and a backing board (201), for electrical actuation upon pressing of actuation rubbers (240). A link plate (220) is disposed between the key frame (210) and a key top (250). The link plate (220 includes a first link part (221) and a second link part (222) integrally connected together through a connecting plate (230) to enable the key top to perform smooth upward and downward actuations. The link plate disposed between the key top and key frame is integrally formed; therefore, even when the user presses only one part of the key top, the entire key top is smoothly actuated due to the smooth and parallel actuations of the link plate. The vertical strokes of the key top are maintained at a constant level due to the integral link plate, and a plurality of actuation rubbers are integrally formed on a sheet so as to make the key board thin.