A type of large file [[folder]] made to hold regular folders and hole-punched [[paper|documents]].

For undergarments designed to flatten the wearer's breasts, see [[chest binder]].

h4. External Link
* "Wikipedia":https://en.wikipedia.org/wiki/Ring_binder

h4.See also
* [[book]]
* [[file cabinet]]
* [[notebook]]
* [[office]]
バインダー