A flexible device includes a substrate including a first region having a first elastic modulus and a second region having a second elastic modulus that is lower than the first elastic modulus, a pixel circuit on the substrate, and a unit device electrically connected to the pixel circuit, wherein the pixel circuit includes a plurality of thin film transistors, a first portion of the plurality of thin film transistors is on the first region of the substrate, and a second portion of the plurality of thin film transistors is on the second region of the substrate.