A pin, or a fall, is a victory condition in various forms of wrestling that is met by holding an opponent's shoulder blades to the wrestling mat for a prescribed period of time.

• In American high school folkstyle wrestling, a pin must be held for two full seconds.
• In American collegiate folkstyle wrestling, a pin must be held for one full second.
• In freestyle and Greco-Roman wrestling worldwide, and in America for 15-year-olds and above, a pin must be held long enough for the referee to count "21, 22" in French (pronounced "vingt-et-un, vingt deux").
• In America, in freestyle and Greco-Roman wrestling for schoolboys (14 years old and below), a pin must be held for two full seconds.
• In professional wrestling, a pin is nominally required to be held for three full seconds, but the staged nature of the sport makes this a somewhat ephemeral requirement.

In amateur wrestling, situations which are almost pins but, for example, have only one shoulder down or have the defending wrestler blocked in a neck bridge are rewarded with near-fall points in order to encourage wrestlers to take risks to try to pin their opponents.

Under the 2004-2005 changes to the FILA rules, amateur wrestling moved to a three-period situation in which each period is a separate match. The pin is an exception - it ends a match outright, unlike period-only victories by technical fall or decision on points.