Stretchable display device

A stretchable display device, comprising:

• a lower substrate as a first substrate, the lower substrate having an active area and a non-active area adjacent to the active area;
• a plurality of second substrates positioned on the lower substrate and horizontally separated from each other;
• a transistor disposed on a second substrate of the plurality of second substrates;
• a light emitting element on the transistor and on the second substrate;
• one or more third substrates positioned between the plurality of second substrates to interconnect two adjacent second substrates, and the third substrate having a first portion having a narrower width than a second portion of the third substrate;
• an upper substrate covering the lower substrate and the light emitting element;
• and
• a plurality of connection lines disposed on the third substrate,
• wherein at least one of the lower substrate and the upper substrate is a flexible substrate, and is configured to be reversibly expand and contract,
• wherein the third substrate has a top surface and a bottom surface, the top surface is adjacent to the connection line and the bottom surface is adjacent to the lower substrate, and a vertical cross section of the third substrate between the top surface and the bottom surface has various shapes.