Stretchable adhesive film and display device comprising same

A stretchable adhesive film comprising:

• a substrate layer comprising an elastomer;
• and
• a first adhesive layer provided on one surface of the substrate layer,
• wherein the stretchable adhesive film satisfies Equation 1:
• 0.95≤a2/a1≤1 [Equation 1]
• in the Equation 1,
• a1 is a stress value of the stretchable adhesive film at X1 under 25±2° C. and 50±5% RH;
• and
• a2 is a stress value at X1 after evaluating elongation/recovery on the stretchable adhesive film 10,000 times with a 20% strain under 25±2° C. and 50±5% RH;
• wherein X1 is a strain value (%) applied to the stretchable adhesive film;
• the strain means an elongational strain;
• and
• X1 is 20.