A vehicle door structure 1 comprises a slide door panel 6 for opening and closing a front region of a rear door opening in a vehicle body 2, a swing door panel 7 for opening and closing a rear region of the rear door opening in cooperation with the slide door panel 6, an opening degree detection mechanism 30 for presuming a locked state on the slide door panel 6 and swing door panel 7 by detecting the opening degree of the slide door panel 6, and a handle idling mechanism 31, provided with the swing door panel 7, for nullifying an operation of a swing door handle 10 when the swing door panel 7 is fully closed.