Display device and manufacturing method of display device

A manufacturing method of a display device comprising:

• a step of preparing a structure including a substrate and a lamination formed on the substrate, the lamination including a sheet substrate having flexibility and adhered to the substrate, a plurality of light-emitting layers respectively provided to a plurality of pixels disposed in a display area, and a sealing layer covering the light-emitting layers;
• a light blocking step of forming a light blocking area on the substrate, the light blocking area not overlapping the display area in a plan view;
• a irradiating step of irradiating light on a side of the substrate after the light blocking step, the side being opposite to the sheet substrate;
• and
• a delaminating step of delaminating the substrate from the sheet substrate after the irradiating step.