A display device comprising: a display unit (DD) comprising a window (WM) and a display module (DM) on a rear surface of the window (WM); and a protective cover configured for transferring the display unit (DD) without defects in a process of manufacturing an electronic device and disposed on a rear surface of the display module (DM), and comprising: a first cover portion ; a second cover portion ; and holding portions extending in a first direction (DR1), or in a second direction (DR2) crossing the first direction (DR1), from the cover portion , and protruding outside the display module (DM) when viewed in a plane, wherein the first direction (DR1) and the second direction (DR2) are substantially parallel with the rear surface of the display module (DM), wherein the display module (DM) comprises a folding area (FA), a first non-folding area (NFA1) and a second non-folding area (NFA2), which are separated by the folding area (FA), and wherein the first cover portion is configured to support the folding area (FA) and the first non-folding area (NFA1) of the display module (DM); and the second cover portion is configured to support the second non-folding area (NFA2) wherein some of the plurality of holding portions are connected to the first cover portion , one of the plurality of holding portions is connected to the second cover portion , and each of the plurality of holding portions provides a flat plate configured for being adsorbed and fixed by a vacuum adsorber. a display unit (DD) comprising a window (WM) and a display module (DM) on a rear surface of the window (WM); and a protective cover configured for transferring the display unit (DD) without defects in a process of manufacturing an electronic device and disposed on a rear surface of the display module (DM), and comprising: a first cover portion ; a second cover portion ; and holding portions extending in a first direction (DR1), or in a second direction (DR2) crossing the first direction (DR1), from the cover portion , and protruding outside the display module (DM) when viewed in a plane, a first cover portion ; a second cover portion ; and holding portions extending in a first direction (DR1), or in a second direction (DR2) crossing the first direction (DR1), from the cover portion , and protruding outside the display module (DM) when viewed in a plane, wherein the first direction (DR1) and the second direction (DR2) are substantially parallel with the rear surface of the display module (DM), wherein the display module (DM) comprises a folding area (FA), a first non-folding area (NFA1) and a second non-folding area (NFA2), which are separated by the folding area (FA), and wherein the first cover portion is configured to support the folding area (FA) and the first non-folding area (NFA1) of the display module (DM); and the second cover portion is configured to support the second non-folding area (NFA2) wherein some of the plurality of holding portions are connected to the first cover portion , one of the plurality of holding portions is connected to the second cover portion , and each of the plurality of holding portions provides a flat plate configured for being adsorbed and fixed by a vacuum adsorber. <EOS>