《唐·乔望尼》（意大利语：Don Giovanni；全名《浪子终受罚，或唐·乔望尼》，Il dissoluto punito, ossia il Don Giovanni，作品号K.527；又译乔望尼先生、唐璜），是一部由沃尔夫冈·阿马多伊斯·莫扎特谱曲，洛伦佐·达·彭特作词的二幕意大利语歌剧，首演于1787年10月29日的布拉格城邦剧院，由莫札特本人亲自指挥。

《唐·乔望尼》虽然和很多其他歌剧一样，以唐璜为主要人物，但这个版本被普遍认为是在众多版本中最为出类拔萃的。而达·彭特为歌剧准备的剧本，把该剧归类为「诙谐戏剧（dramma giocoso）」，而莫札特自己则把该剧收入「喜歌剧（Opera buffa）」的分类下。虽然常常被归类为喜剧，但是实际上该剧融合了喜剧、悲剧甚至超自然事件的元素。

Don Giovanni (Italian pronunciation: [dɔn dʒoˈvanni]; K. 527; complete title: Il dissoluto punito, ossia il Don Giovanni, literally The Rake Punished, or Don Giovanni) is an opera in two acts with music by Wolfgang Amadeus Mozart and Italian libretto by Lorenzo Da Ponte. It is based on the legends of Don Juan, a fictional libertine and seducer. It was premiered by the Prague Italian opera at the Teatro di Praga (now called the Estates Theatre) on 29 October 1787. Da Ponte's libretto was billed, like many of its time, as dramma giocoso, a term that denotes a mixing of serious and comic action. Mozart entered the work into his catalogue as an opera buffa. Although sometimes classified as comic, it blends comedy, melodrama and supernatural elements.