The subject innovation is a kind hard disk data interface adapter including a plug terminal and a contact terminal and the plug terminal end distances from relatively large distances from the installation is relatively small at the other end of the multiple metal conductors relates to a pitch converter; Connection for connecting the non-adjacent any metal conductors in the contact terminal over the metal conductor; A base with a slot for fixing the connecting channel and which accommodates the contact terminal is installed; And a cover that is used in combination with the base, and there of which, installed add-extending one, the metal conductors of the contact terminal Finish obscures the gap between the contact terminals and the channel. The subject innovation will be through to establish a connection to connect to lubricate any two or several circuits, and also, the connection portion can be achieved the miniaturization of the apparatus volume, and a colloid or foreign matter contacted to establish an extension in the metal conductor of the contact terminal It can be prevented from falling to the contact end of the terminal there is not a phenomenon such as short circuit is not generated.