An elastic device includes a first elastic supporter; a second elastic supporter and a carbon nanotube film. The second elastic supporter is spaced from the first elastic supporter. The carbon nanotube film has a first side fixed on the first elastic supporter and a second side opposite to the first side and fixed on the second elastic supporter. The carbon nanotube film includes a plurality of carbon nanotube strings separately arranged, located side by side and extending substantially along a first direction from the first side to the second side and one or more carbon nanotubes located between adjacent carbon nanotube strings. The carbon nanotube film is capable of elastic deformation along a second direction that is substantially perpendicular to the first direction.