《赫尔辛基宣言》（英语：Declaration of Helsinki）是于1964年提出的一个医学伦理学宣言。其内容是围绕医学研究运用于人体时归立了六项基本原则。

除此亦提出「告知后同意」法则（informed consent），即接受测试者外，还包括所有病患及身体因测试的反应，有说「不」或选择的权利。

The Declaration of Helsinki (DoH) is a set of ethical principles regarding human experimentation developed for the medical community by the World Medical Association (WMA). It is widely regarded as the cornerstone document on human research ethics.

It is not a legally binding instrument under the international law, but instead draws its authority from the degree to which it has been codified in, or influenced, national or regional legislation and regulations. Its role was described by a Brazilian forum in 2000 in these words "Even though the Declaration of Helsinki is the responsibility of the World Medical Association, the document should be considered the property of all humanity".