A keyboard structure permitting the interconnection of several hundred flexible key structures in a compact area. The structure includes a matrix of key cells disposed on an insulating surface, the row elements being commonly connected by conductive paths on the surface while the column elements are electrically separate. A contact point for each row and each column element extends to the opposite side of the insulating surface. These contact points are so disposed that parallel conductive paths which run only in the vertical direction may be used to provide row-select and column-select indications.