无安打比赛（No-hit Game或No-hitter，英文口语会用no-no）在棒球与垒球里指的是在整场比赛里不让对手击出任何一支安打（在今日的美国职棒大联盟里还规定至少要投满9局）。界外球、擦棒被捕、滚地球出局、高飞球出局、四坏球、以及失误等等都不算破坏了无安打比赛。

不让对手击出安打的投手称为「投出一场无安打比赛」。无安打比赛的成就很罕见，且被认为是投手或是投手群的非凡成就。在职业比赛大多数的情形里，无安打比赛是由单独一位投手完投比赛。

一场比赛被称为无安打比赛并不代表敌队没有上垒，因为上垒的方法不止击出安打一种。所以无安打比赛也不代表完封，而且虽然极为罕见，但也是有可能投出无安打比赛却输球。如果是无安打比赛而且对手也没有上垒，则称为完全比赛。完全比赛依照定义必须是完封胜。

In baseball, a no-hitter (also known as a no-hit game and colloquially as a no-no) is a game in which a team was not able to record a single hit. Major League Baseball (MLB) officially defines a no-hitter as a completed game in which a team that batted in at least nine innings recorded no hits. A pitcher who prevents the opposing team from achieving a hit is said to have "thrown a no-hitter". This is a rare accomplishment for a pitcher or pitching staff: only 295 have been thrown in Major League Baseball history since 1876, an average of about two per year. In most cases in MLB, no-hitters are recorded by a single pitcher who throws a complete game; one thrown by two or more pitchers is a combined no-hitter. The most recent no-hitter by a single pitcher was thrown on April 21, 2016 by Jake Arrieta of the Chicago Cubs against the Cincinnati Reds at Cincinnati's Great American Ball Park. The most recent combined no-hitter was thrown by Cole Hamels, Jake Diekman, Ken Giles, and Jonathan Papelbon of the Philadelphia Phillies against the Atlanta Braves on September 1, 2014.