The vehicular open and close panel system includes a drive means configured to supply power for sliding, and opening and closing a panel to open and close an opening of a vehicle body; a drive mechanism configured to operate the panel by power from the drive means; and a controller configured to control an operation of the panel, wherein the controller includes a pinch detection mode of making the panel perform a pinch elimination operation upon detecting a pinch in a close direction operation, and a complete close mode of prioritizing a close direction operation, depending on a complete close operation of a passenger, and wherein after performing the pinch detection operation by the pinch detection mode, the controller changes the close direction operation to the complete close mode until a predetermined condition is satisfied.