拒绝心肺复苏术（英语：Do not resuscitate，缩写为DNR），又译为放弃心肺复苏术、放弃急救同意书，也称为拒绝紧急救治（No Code）或No CPR，是一种法律文书，病患在平时或在医院时预先签署，表明当他们面临心跳停止或呼吸停止的状况时，不愿意接受心肺复苏术（Cardiopulmonary resuscitation, CPR）或高级心脏救命术（Advanced cardiac life support, ACLS）来延长生命。患者通常为老年人，或者长期多病住院，或患有预后不良的晚期癌症。DNR不影响除了气管插管与心肺复苏术以外的其他抢救手段，患者仍可接受化疗、抗生素治疗、透析等。

Do not resuscitate (DNR), or no code, is a legal order written either in the hospital or on a legal form to withhold cardiopulmonary resuscitation (CPR) or advanced cardiac life support (ACLS), in respect of the wishes of a patient in case their heart were to stop or they were to stop breathing. "No code" is a reference to the use of "code" as jargon for "calling in a Code Blue" to alert a hospital's resuscitation team. The DNR request is usually made by the patient or health care power of attorney and allows the medical teams taking care of them to respect their wishes. In the health care community, allow natural death (AND), is a term that is quickly gaining favor as it focuses on what is being done, not what is being avoided. Some criticize the term "do not resuscitate" because it sounds as if something important is being withheld, while research shows that only about 5% of patients who require CPR outside the hospital and only 15% of patients who require CPR while in the hospital survive. Patients who are elderly, are living in nursing homes, have multiple medical problems, or who have advanced cancer are much less likely to survive.