Display device and deposition mask

A display device provided with a display region including a plurality of pixels and a frame region around the display region, comprising:

• an active matrix substrate including a transistor element;
• a light-emitting element layer provided on the active matrix substrate and including a plurality of first electrodes, a function layer, and a second electrode in this order from the active matrix substrate side;
• and
• a sealing layer provided on the light-emitting element layer,
• wherein the light-emitting element layer further includes an edge cover layer configured to cover an end portion of each one of the plurality of first electrodes,
• the edge cover layer includes a plurality of openings configured to expose the plurality of first electrodes included in the plurality of pixels,
• the plurality of openings include a first opening with a rectangular shape,
• a first individual vapor deposition film with a rectangular shape is formed on the first electrode covering the first opening, and
• in the first individual vapor deposition film, projection portions projecting from sections corresponding to at least some opposing vertices of the first opening to an opposite side to the first opening are provided on the edge cover layer.