According to an aspect, a stretchable device includes: a resin base member including a plurality of bodies disposed apart from each other and a plurality of hinges that couple the bodies to each other; and an array layer provided on the resin base member. The array layer includes a plurality of wiring lines extending along the hinges and spaced apart from each other in a width direction of the hinges. Each of the hinges has a plurality of bends bending when viewed in a stacking direction in which the resin base member and the array layer are stacked. Each of the bends has at least one or more slits that are formed between the wiring lines when viewed in the stacking direction and that divide the bend in the width direction.