A foldable display device may prevent defects in touch sensing, caused by stress concentrated at a folding part. A foldable display device may include a lower base material and an upper base material, each base material including at least one folding part and non-folding parts in a display area; a thin film transistor array on the lower base material; an organic light emitting array on the thin film transistor array; a touch electrode array disposed on the upper base material, and oppositely bonded to the organic light emitting array disposed opposite to the touch electrode array by an adhesive layer; and a plurality of wirings having a zigzag shape and uneven depth level in the folding part on the upper base material.