A display device comprising: a display panel comprising an insulation layer, first pads (PD1-P) that are arranged in a first direction and exposed from the insulation layer, and second pads (PD2-P) that are spaced apart from the first pads (PD1-P) in a second direction crossing the first direction, arranged in the first direction, and exposed from the insulation layer; a main circuit board (MPCB); a first connecting circuit board (FPCB1) electrically connected to the first pads (PD1-P) and the main circuit board (MPCB); a second connecting circuit board (FPCB2) electrically connected to the main circuit board (MPCB) and the second pads (PD2-P), which are spaced farther from an edge (E-DP) of the display panel than the first pads (PD1-P), and disposed above the first connecting circuit board (FPCB 1); a first sealing member configured to seal a first gap defined between the first connecting circuit board (FPCB1) and the insulation layer; and a second sealing member configured to seal a second gap defined between the second connecting circuit board (FPCB2) and the insulation layer, wherein a portion of the first sealing member is disposed between the first connecting circuit board (FPCB1) and the second connecting circuit board (FPCB2) wherein a first driving chip is mounted to the first connecting circuit board (FPCB 1); wherein a second driving chip is mounted to the second connecting circuit board (FPCB2), wherein each of the first connecting circuit board and the second connecting circuit board includes three portions distinguished from each other according to their respective width in the first direction, the first and second pads being arranged on a first portion of the first and second connecting circuit boards, the first and second driving chips being arranged on a second portion of the first and second connecting circuit boards, a third portion connecting the first portion to the second portion of the first and second connecting circuits boards, wherein the width of the first portion is greater than that of the second portion, and wherein the third portion has a width that gradually decreases in the second direction, wherein the second portion of the first connecting circuit board does not overlap the second portion of the second connecting board, wherein the first driving chip and the second driving chip are spaced apart in the first direction when viewed on a plane. a display panel comprising an insulation layer, first pads (PD1-P) that are arranged in a first direction and exposed from the insulation layer, and second pads (PD2-P) that are spaced apart from the first pads (PD1-P) in a second direction crossing the first direction, arranged in the first direction, and exposed from the insulation layer; a main circuit board (MPCB); a first connecting circuit board (FPCB1) electrically connected to the first pads (PD1-P) and the main circuit board (MPCB); a second connecting circuit board (FPCB2) electrically connected to the main circuit board (MPCB) and the second pads (PD2-P), which are spaced farther from an edge (E-DP) of the display panel than the first pads (PD1-P), and disposed above the first connecting circuit board (FPCB 1); a first sealing member configured to seal a first gap defined between the first connecting circuit board (FPCB1) and the insulation layer; and a second sealing member configured to seal a second gap defined between the second connecting circuit board (FPCB2) and the insulation layer, wherein a portion of the first sealing member is disposed between the first connecting circuit board (FPCB1) and the second connecting circuit board (FPCB2) wherein a first driving chip is mounted to the first connecting circuit board (FPCB 1); wherein a second driving chip is mounted to the second connecting circuit board (FPCB2), wherein each of the first connecting circuit board and the second connecting circuit board includes three portions distinguished from each other according to their respective width in the first direction, the first and second pads being arranged on a first portion of the first and second connecting circuit boards, the first and second driving chips being arranged on a second portion of the first and second connecting circuit boards, a third portion connecting the first portion to the second portion of the first and second connecting circuits boards, wherein the width of the first portion is greater than that of the second portion, and wherein the third portion has a width that gradually decreases in the second direction, wherein the second portion of the first connecting circuit board does not overlap the second portion of the second connecting board, wherein the first driving chip and the second driving chip are spaced apart in the first direction when viewed on a plane.