西班牙国家德比（西班牙语：El Clásico，加泰罗尼亚语：El Clàssic） ，又称经典大战、世纪对决，是西班牙最老牌的两支球会皇家马德里和巴塞隆拿的对碰。两支球队各属于西班牙最大的两个城市马德里和巴塞隆拿，通常以西班牙族主义和加泰罗尼亚民族主义分别，两家球会是西班牙最成功和影响力最大的球会。这是世界上最强的对赛之一，每场赛事都有很多国家数以亿计的球迷观战。

西班牙名词clásico出自2000年代中期，本来形客容南美洲的足球打吡。这个名词的冒起，是因为西班牙足球在美洲越来越受到注目，两队的对战因而在美洲受到更大的关注。

El Clásico (Spanish pronunciation: [el ˈklasiko]; Catalan:El Clàssic, pronounced: [əɫ ˈkɫasik]; "The Classic") is the name given in football to any match between fierce rivals Real Madrid C.F. and FC Barcelona. Originally it referred only to those competitions held in the Spanish championship, but nowadays the term has been generalized, and tends to include every single match between the two clubs: UEFA Champions League, Copa del Rey, etc. Other than the UEFA Champions League Final, it is the biggest football club game in the world, and is among the most viewed annual sports events.