指甲彩绘（ネイルアート）是指以指甲油或其他颜料在指甲绘上图案，或加上其他材质如珠子、闪石等来装饰指甲。

西元前时期，在埃及及中国的唐朝即开始出现为指甲上色的风潮。埃及是由埃及艳后开始，她将指甲以指甲花染上了金色，作为通往西方极乐世界之用；而唐朝是以凤仙花来浸染指甲，用意是来显示身分尊贵；而于二十世纪末，由日本的澁谷教主滨崎步带领出指甲彩绘的风潮，一直持续至今日。

Artificial nails, also known as fake nails, false nails, fashion nails, nail enhancements, or nail extensions, are coverings placed over fingernails as fashion accessories. Some artificial nails attempt to mimic the appearance of real fingernails as closely as possible, while other designs may deliberately stray in appearance from real fingernails. Artificial nails are made from a wide variety of materials.