The concealed attachment system for motorcycle saddlebags includes a rear under-fender bracket, the saddlebags having corresponding brackets installed upon their inboard surfaces. The under-fender bracket may be either of two embodiments: one for installation on motorcycles having exposed rear fender mounting rails, and the other for installation on cycles having concealed rear fender rails, the second embodiment including replacement rails. Each under-fender bracket includes two parallel lock pin sockets to each side, the saddlebag brackets having corresponding lock pins extending upwardly therefrom. In one embodiment, the lock pin actuating ends are accessed from outside the saddlebag, while in another embodiment the lock pin actuating ends are enclosed within the bag for security. The saddlebags are installed and removed quickly and easily without tools by manipulating the actuation ends of the lock pins to engage or disengage them with the corresponding sockets of the under-fender bracket.