A display device, comprising a display panel including a display region (DP-DA) and a non-display region (DP-NDA) enclosing the display region (DP-DA), when viewed in a plan view, wherein the display panel comprises: an organic light emitting device or another light emitting device provided in the display region (DP-DA); circuit devices configured to drive the organic or other light emitting device; a detection line overlapped with the non-display region (DP-NDA) and configured to indicate whether or not there is a damage in an interconnection structure and/or in an electronic device of the display device; detection pads (PD1, PD2) connected to the detection line; and an input line connecting an input pad of the detection pads (PD1, PD2) to the detection line, wherein the detection line comprises: a first line portion provided at a level different from a level of the input line, the first line portion including an end portion, which is connected to the input line through a first interconnection contact hole (CD-CH1) in a first contact region (AR-CH1); and a second line portion provided at a level different from the level of the first line portion and connected to an opposite end portion of the first line portion through a second interconnection contact hole (CD-CH2) in a second contact region (AR-CH2), wherein the first line portion and the second line portion extend along an edge region of the display region (DP-DA) in at least a first direction, wherein, when viewed in the plan view, the first line portion is provided closer to the display region (DP-DA) than the second line portion, and a distance, along a second direction perpendicular to the first direction, between a portion of the first line portion extending in the first direction and a closest portion of the second line portion extending in the first direction in a non-contact region (AR-NCH) is less than a distance, along the second direction, between the end portion of the first line portion, which is connected to the input line through the first interconnection contact hole (CD-CH1) and a closest portion of the second line portion extending in the first direction. an organic light emitting device or another light emitting device provided in the display region (DP-DA); circuit devices configured to drive the organic or other light emitting device; a detection line overlapped with the non-display region (DP-NDA) and configured to indicate whether or not there is a damage in an interconnection structure and/or in an electronic device of the display device; detection pads (PD1, PD2) connected to the detection line; and an input line connecting an input pad of the detection pads (PD1, PD2) to the detection line, wherein the detection line comprises: a first line portion provided at a level different from a level of the input line, the first line portion including an end portion, which is connected to the input line through a first interconnection contact hole (CD-CH1) in a first contact region (AR-CH1); and a second line portion provided at a level different from the level of the first line portion and connected to an opposite end portion of the first line portion through a second interconnection contact hole (CD-CH2) in a second contact region (AR-CH2), a first line portion provided at a level different from a level of the input line, the first line portion including an end portion, which is connected to the input line through a first interconnection contact hole (CD-CH1) in a first contact region (AR-CH1); and a second line portion provided at a level different from the level of the first line portion and connected to an opposite end portion of the first line portion through a second interconnection contact hole (CD-CH2) in a second contact region (AR-CH2), wherein the first line portion and the second line portion extend along an edge region of the display region (DP-DA) in at least a first direction, wherein, when viewed in the plan view, the first line portion is provided closer to the display region (DP-DA) than the second line portion, and a distance, along a second direction perpendicular to the first direction, between a portion of the first line portion extending in the first direction and a closest portion of the second line portion extending in the first direction in a non-contact region (AR-NCH) is less than a distance, along the second direction, between the end portion of the first line portion, which is connected to the input line through the first interconnection contact hole (CD-CH1) and a closest portion of the second line portion extending in the first direction.