国家游泳中心，其建筑设计方案名为「水立方」（Water Cube），是2008年北京奥运主要的水上项目比赛场馆，位于中国北京市奥林匹克公园，奥运期间会用作游泳、花样游泳与跳水赛事之用。建筑费用为10.2亿元。国家游泳中心虽然被叫做“水立方”，但实际上并非立方体，而是长方体。

北京奥运会期间，水立方中进行的各项赛事共打破25项世界纪录。奥运会后，水立方内部一半被改造成“水立方嬉水乐园”。

The Beijing National Aquatics Center (simplified Chinese:北京国家游泳中心; traditional Chinese:北京国家游泳中心; pinyin:Běijīng guójiā yóuyǒng zhōngxīn), also officially known as the National Aquatics Center, and colloquially known as the Water Cube (Chinese:水立方), is an aquatics center that was built alongside Beijing National Stadium in the Olympic Green for the swimming competitions of the 2008 Summer Olympics. Despite its nickname, the building is not an actual cube, but a cuboid (a rectangular box). Ground was broken on December 24, 2003, and the Center was completed and handed over for use on January 28, 2008. Swimmers at the Water Cube broke 25 world records during the 2008 Olympics.