合格境内机构投资者，即QDII，是「Qualified Domestic Institutional Investor」的首字缩写。它是在一国境内设立，经该国有关部门批准从事境外证券市场的股票、债券等有价证券业务的证券投资基金。和QFII一样，它也是在货币没有实现完全可自由兑换、资本项目尚未开放的情况下，有限度地允许境内投资者投资境外证券市场的一项过渡性的制度安排。

Qualified Domestic Institutional Investor (simplified Chinese:合格境内机构投资者; traditional Chinese:合格境內機構投資者; pinyin:Hégé Jìngnèi Jīgòu Tóuzīzhě), also known as QDII, is a scheme relating to the capital market set up to allow financial institutions to invest in offshore markets such as securities and bonds. Similar to QFII (Qualified Foreign Institutional Investor), it is a transitional arrangement which provides limited opportunities for domestic investors to access foreign markets at a stage where a country/territory’s currency is not traded or floated completely freely and where capital is not able to move completely freely in and out of the country.