针对买卖关系中的无权处分行为,我国《合同法》第51条和《物权法》第106条分别从合同关系角度和物权变动角度对其进行普适性规定,2012年5月颁布的《买卖合同司法解释》第3条也对其进行规定。文章旨在论证上述三规定并不存在冲突和矛盾,并就三法条的适用问题进行探讨,为解决实践中三者的适用效力问题提供依据。 In view of the non-punitive act in the sale-and-purchase relationship, Article 51 of the Contract Law and Article 106 of the Real Right Law respectively stipulate universally the contractual relations and the real rights changes. In May 2012, Article 3 of the Judicial Interpretation of the Sale and Purchase Contract also provides for it. The article aims to demonstrate that there are no conflicts and contradictions in the above three provisions, and to discuss the application of the Three Laws, so as to provide the basis for solving the problem of the effectiveness of the three in practice.