斯特拉迪瓦里琴是指著名乐器制造师安东尼奥·史特拉第瓦里所所制作的弦乐器，斯特拉迪瓦里所制作的弦乐器被认为是历史上最好的弦乐器之一，具有高度的价值，而且其价格还会随着时间和曾经拥有及演奏过者的身分而上升，直到现在仍有许多职业音乐家使用斯特拉迪瓦里琴来演奏。

在历史上拍卖价格最高的乐器中，斯特拉迪瓦里琴占据了前5名，而且都是经由佳士得来卖出。佳士得在2006年5月16日以3,544,000美元的价格将斯特拉迪瓦于1707年制作的The Hammer卖出，并创下有史以来乐器最高的成交价格。2014年，再有斯特拉迪瓦里琴流出市场，史特拉第瓦里于1719年制造，取名为「麦克唐纳」（Macdonald）的一副中提琴，由苏富比进行拍卖，预计成交价超过4500万美元。

A Stradivarius is one of the violins, violas, cellos and other string instruments built by members of the Italian family Stradivari (Stradivarius), particularly Antonio Stradivari, during the 17th and 18th centuries. According to their reputation, the quality of their sound has defied attempts to explain or equal it, though this belief is disputed. The name "Stradivarius" has become a superlative often associated with excellence; to be called "the Stradivari" of any field is to be deemed the finest there is. The fame of Stradivarius instruments is widespread, appearing in numerous works of fiction.