皮萨诺龙属（学名：Pisanosaurus）又名匹萨诺龙、皮萨龙、比辛奴龙或皮沙诺龙，是二足的原始鸟臀目恐龙，生存于晚三叠纪的南美洲。其学名来自牠的发现者皮萨诺。

皮萨诺龙是在1967年由阿根廷古动物学家Rodolfo Casamiquela叙述、命名。模式种是P. mertii，也是唯一的种。化石发现于阿根廷的伊斯基瓜拉斯托组（Ischigualasto Formation），年代属于三叠纪晚期的卡尼阶，约2亿2800万到2亿1650万年前。

自从发现以来，皮萨诺龙的分类、演化位置长期处在争议。最近几年的意见倾向于，皮萨诺龙是已知最原始的鸟臀目恐龙。

Pisanosaurus (pron.:"PIE-san-uh-SAWR-us") is an extinct genus of primitive ornithischian dinosaur that lived approximately 228 to 216 million years ago during the latter part of the Triassic Period in what is now South America. It was a small, lightly-built, ground-dwelling, bipedal herbivore, that could grow up to an estimated 1 m (3.3 ft) long. Only one species, the type, Pisanosaurus mertii, is known, based on a single partial skeleton discovered in Argentina's Ischigualasto Formation.