State of discontinuities is interpreted through those of recovered core, which cannot provide any information on joint orientation, actual apertures, filling materials and so on. By using Borehole Scanner System (BSS), we can observe discontinuities in the undisturbed condition and obtain more realistic information. There is some difference between obtained core pieces and BSS survey due to their own data acquisition systems. In this paper, we compare obtained core pieces with BSS image in terms of joint spacing and RQD. The result leads to the construction of data base for the use of practical design and supervision.