非我所创或NIH综合症（英文：Not Invented Here Syndrome），指的是社会、公司和组织中的一种文化现象，人们不愿意使用、购买或者接受某种产品、研究成果或者知识，不是出于技术或者法律等因素，而只是因为它源自其他地方。

NIH是英文Not Invented Here（非我所创）的缩写，通常带有贬义。在国家范围内的NIH综合征是民族主义的一种形式，比如中国历史上曾经出现的抵制日货运动。

苹果公司的Mac OS操作系统曾经墨守自己较早提出而被界面设计界奉为经典的Apple Human Interface Guidelines，其他操作系统中出现的许多创新只要违反或者超出这一规范，都不予采纳。

Not invented here (NIH) is a stance adopted by social, corporate, or institutional cultures that avoid using or buying already existing products, research, standards, or knowledge because of their external origins and costs.

The reasons for not wanting to use the work of others are varied, but some can include fear of patent infringement, lack of understanding of the foreign work, an unwillingness to acknowledge or value the work of others (jealousy), and forming part of a wider turf war. As a social phenomenon, this philosophy manifests as an unwillingness to adopt an idea or product because it originates from another culture, a form of tribalism.