鲁杰罗·莱翁卡瓦洛（意大利语：Ruggero Leoncavallo，1857年4月23日－1919年8月9日），意大利歌剧作曲家。

莱翁卡瓦洛学于那不勒斯音乐学院，推崇瓦格纳并受其影响；作有歌剧约20部；根据卡拉勃里安村情杀事件所作的歌剧《丑角》是真实主义歌剧的代表作品，音乐粗放而富于戏剧性，与马斯卡尼的《乡村骑士》齐名。

莱翁卡瓦洛也曾写作歌剧《波希米亚人》，并因与普契尼的同名作品发生冲突而导致两人关系破裂。

Ruggero (or Ruggiero) Leoncavallo (Italian pronunciation: [rudˈdʒɛːro leoŋkaˈvallo]; 23 April 1857 –9 August 1919) was an Italian opera composer and librettist. Although he would produce numerous operas and other songs throughout his career it is his two-act work Pagliacci (1892) that remained his lasting contribution, despite attempts to escape the shadow of his greatest success.