A display device including a base substrate including a first base film, a second base film disposed on the first base film, and a connection wire, wherein at least a portion of the connection wire is disposed between the first base film and the second base film, a pixel circuit disposed on the base substrate, a light emitting element disposed on the pixel circuit and electrically connected to the pixel circuit, and a driving part disposed under the base substrate. The first base film has a first penetration part and a first protrusion part protruding toward the second base film, and the second base film has a second penetration part overlapping the first protrusion part and a second protrusion part protruding toward the first base film and overlapping the first penetration part. The connection wire extends to an upper surface of the base substrate along the first protrusion part.