无因管理是大陆法系民法中债法上的一个概念，是指在没有法定或约定义务的情况下，为避免他人利益受损失而进行管理或服务的行为。

****民法172条规定：「未受委任，并无义务，而为他人管理事务者，...」即为对无因管理所做出之规定。无因管理就其字面观之，「无因」即无法律上之义务，所以无法律上之义务而为他人管理事务即为「无因管理」。在个人主义的思想之下，个人之事务原则上不容许他人干涉，否则将可能成立侵权行为，然而这将使这个社会变得自私自利，个人为恐侵犯到他**利而不愿伸手扶持；而无因管理此种制度的设置意义即在调和此种情形，鼓励人类互助合作、相互扶持，进而使生活更便利，社会更加美满和谐。不过，若是过度的放松无因管理之成立，对于本人亦可能造成极大的不便与困扰，故法律在此亦做出相当的限制，而使其成立与否必须适度的受限于本人的意思之。

Negotiorum gestio (Latin for "management of business") is a form of spontaneous voluntary agency in which an intervenor or intermeddler, the gestor, acts on behalf and for the benefit of a principal (dominus negotii), but without the latter's prior consent. The gestor is only entitled to reimbursement for expenses and not to remuneration, the underlying principle being that negotiorum gestio is intended as an act of generosity and friendship and not to allow the gestor to profit from his intermeddling. This form of intervention is classified as a quasi-contract and found in civil-law jurisdictions and in mixed systems (e.g. Scots, South African, and Philippine laws).