A slide door structure includes: a slide door provided to be movable with respect to a vehicle body; and a wire harness routed between the vehicle body and the slide door by allowing an electric wire bundle to pass through a bendable exterior member. The wire harness is connected to the slide door by door-side fixture including an outer member attached to the slide door and an inner member provided on the wire harness and supported by the outer member so as to be rotatable about an axis in an upper-lower direction as a center. In the door-side fixture, the inner member is supported by the outer member so as to be slidable in a direction perpendicular to the axis.