The present invention relates to a keyboard formed so as to be attachable to and detachable from a terminal main body and capable of comprising: a keyboard main body having key buttons formed on one surface; an accommodation part formed on the one surface so as to accommodate at least a portion of the terminal main body; and a cover formed so as to be rotatable from the one surface such that the cover covers at least a portion of the accommodation part in a closed state and exposes the accommodation part in an open state. In addition, the keyboard according to the present invention is preferably formed such that the keyboard main body is turned on or off according to the opening or closing of the cover.