摘要:不纯正不作为犯罪是指以不作为方式实施既能由作为构成，也能由不作为构成的犯罪。无论是在刑法理论中或是司法实践中，不纯正不作为犯的问题，历来就有“未解之谜”之称。我国现行刑法并没有明确规定其作为义务来源，而先行行为是否为犯罪行为学术界也存在较大分歧，这不可避免地造成了刑法理论上的分歧和司法实践中的混乱。为了有效地解决这些问题，本文通过对作为义务来源学说的考察，指出我们应该借鉴国外某些司法实践，坚持不纯正不作为犯义务的形式来源和实质来源的统一，构建一种递进、收缩式的不纯正不作为犯义务来源。

关键词：不纯正不作为犯  义务来源  作为义务

Abstract:Offense of non-typical omission refers to the crime can be committed either by commission or omission , and it taken by omission. Whether in the criminal law theory or practice of administration of justice，offense  of non-typical omission is a “mystery” vexing problem．The Chinese current Criminal Code does not comprehensively regulate offense of non-typical omission, and does not clearly defined as a source of obligations, while  the previous act of omission is a crime there are also large differences in the academic community, which inevitably led to differences in criminal law theory and judicial practice in the confusion. In order to effectively address these issues, this article through the examination of doctrine as a source of obligations that we should learn from some foreign judicial practice, Insisted the unity of the source of the act duties’ form and essence, to build a progressive, shrink-style Offense of non-typical omission source of obligations.

Key words：offense of non-typical omission；source of obligation；commitment to do