A display device comprising: a display panel; and an input sensing unit comprising a sensing electrode and disposed directly on the display panel, the display panel comprises: a light emitting element comprising a first electrode disposed on a base insulation layer, a second electrode, and a light emitting layer disposed between the first electrode and the second electrode; a pixel defining layer disposed between the second electrode and the base insulation layer, and comprising a first portion (PDL-10), in which an opening to expose the first electrode is defined; and a plurality of interlayers (CPL, IS-IL) disposed on a plurality of thin-films disposed on the second electrode; and one of the plurality of interlayers (CPL, IS-IL) comprises a first area, which overlaps the first portion (PDL-10) of the pixel defining layer characterized in that the pixel defining layer further comprises a second portion (PDL-20), which is disposed adjacent to the first portion (PDL-10) and has a thickness greater than that of the first portion (PDL-10); and the one of the plurality of interlayers (CPL, IS-IL) further comprises a second area, which overlaps the second portion (PDL-20) of the pixel defining layer and has a thickness greater than that of the first area, wherein a difference in thickness between the second area and the first area is substantially the same as difference in thickness between the second portion (PDL-20) and the first portion (PDL-10), such that a distance between the second electrode and the sensing electrode is uniform. a display panel; and an input sensing unit comprising a sensing electrode and disposed directly on the display panel, the display panel comprises: a light emitting element comprising a first electrode disposed on a base insulation layer, a second electrode, and a light emitting layer disposed between the first electrode and the second electrode; a pixel defining layer disposed between the second electrode and the base insulation layer, and comprising a first portion (PDL-10), in which an opening to expose the first electrode is defined; and a light emitting element comprising a first electrode disposed on a base insulation layer, a second electrode, and a light emitting layer disposed between the first electrode and the second electrode; a pixel defining layer disposed between the second electrode and the base insulation layer, and comprising a first portion (PDL-10), in which an opening to expose the first electrode is defined; and a plurality of interlayers (CPL, IS-IL) disposed on a plurality of thin-films disposed on the second electrode; and one of the plurality of interlayers (CPL, IS-IL) comprises a first area, which overlaps the first portion (PDL-10) of the pixel defining layer characterized in that the pixel defining layer further comprises a second portion (PDL-20), which is disposed adjacent to the first portion (PDL-10) and has a thickness greater than that of the first portion (PDL-10); and the one of the plurality of interlayers (CPL, IS-IL) further comprises a second area, which overlaps the second portion (PDL-20) of the pixel defining layer and has a thickness greater than that of the first area, wherein a difference in thickness between the second area and the first area is substantially the same as difference in thickness between the second portion (PDL-20) and the first portion (PDL-10), such that a distance between the second electrode and the sensing electrode is uniform.