A display device comprising: a display panel; and an input sensing unit comprising a sensing electrode and disposed directly on the display panel, wherein: the display panel comprises: a light emitting element comprising a first electrode, which contacts 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 below the second electrode, contacting the base insulation layer, and comprising a first portion (PDL-1), in which an opening to expose the first electrode is defined, and a plurality of thin-films disposed on the second electrode; and an insulation pattern disposed on the plurality of thin-films, overlapping the pixel defining layer; and characterized in that the pixel defining layer comprises a second portion (PDL-2), which is disposed on the first portion (PDL-1) and overlaps the first portion (PDL-1); the insulation pattern overlaps the second portion (PDL-2) of the pixel defining layer; a distance between a first portion, which overlaps the insulation pattern, of the sensing electrode and the base insulation layer is greater than a distance between a second portion, which non-overlaps the insulation pattern, of the sensing electrode and the base insulation layer by a thickness of the insulation pattern, wherein the second portion (PDL-2) of the pixel defining layer has a thickness which is substantially the same as a thickness of the insulation pattern, such that a distance between the first portion of the sensing electrode and the second electrode is substantially the same as that between the second portion of the sensing electrode and the second electrode. a display panel; and an input sensing unit comprising a sensing electrode and disposed directly on the display panel, wherein: the display panel comprises: a light emitting element comprising a first electrode, which contacts 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 below the second electrode, contacting the base insulation layer, and comprising a first portion (PDL-1), in which an opening to expose the first electrode is defined, and a plurality of thin-films disposed on the second electrode; and an insulation pattern disposed on the plurality of thin-films, overlapping the pixel defining layer; and the display panel comprises: a light emitting element comprising a first electrode, which contacts 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 below the second electrode, contacting the base insulation layer, and comprising a first portion (PDL-1), in which an opening to expose the first electrode is defined, and a plurality of thin-films disposed on the second electrode; and a light emitting element comprising a first electrode, which contacts 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 below the second electrode, contacting the base insulation layer, and comprising a first portion (PDL-1), in which an opening to expose the first electrode is defined, and a plurality of thin-films disposed on the second electrode; and an insulation pattern disposed on the plurality of thin-films, overlapping the pixel defining layer; and characterized in that the pixel defining layer comprises a second portion (PDL-2), which is disposed on the first portion (PDL-1) and overlaps the first portion (PDL-1); the insulation pattern overlaps the second portion (PDL-2) of the pixel defining layer; a distance between a first portion, which overlaps the insulation pattern, of the sensing electrode and the base insulation layer is greater than a distance between a second portion, which non-overlaps the insulation pattern, of the sensing electrode and the base insulation layer by a thickness of the insulation pattern, wherein the second portion (PDL-2) of the pixel defining layer has a thickness which is substantially the same as a thickness of the insulation pattern, such that a distance between the first portion of the sensing electrode and the second electrode is substantially the same as that between the second portion of the sensing electrode and the second electrode.