诚信原则在法律中的适用源于债法中对平等民事主体行为的规制，之后逐渐演变为民法的基本原则。而其在我国民事诉讼中的确立，始于2012年《民事诉讼法》修改，在第十三条中引入诚信原则，标志着实体法中的基本原则在程序法中开花结果。2021年《民事诉讼法》第13条“民事诉讼应当遵循诚实信用原则”修改为“民事诉讼应当遵循诚信原则”，表明立法者对于在民事诉讼中应当遵守诚信原则的重视和强调。随着民事诉讼的进行从以法官为中心推进程序向当事人和法官的能动管理共同推进程序的理念变迁，民事诉讼模式从职权主义向当事人主义、并向协同主义转变，在某种程度上可以说提高了当事人的诉讼地位。然而，仅就诚信原则的适用范围而言，实际上存在很大的偏颇。即由于各种因素的影响，至少在法律制度层面，将诚信原则用于规制当事人的违反诚信的诉讼行为没有疑义。而将该原则适用于规制法官的审判行为，则不仅在理论界尚存争议，而且在法律上实际并无明确的规定。

司法实践中，由于法官自由裁量权缺乏程序性规制，加之司法观念上对诚信原则能否适用于法官的漠视，因此，对于法官“失信”的审判行为并不重视。实际上，法官因违反诚信的行为导致司法信任危机，同时亦导致审判不公，这些现象并不鲜见。对此，探究以诚信原则规制和约束法官裁判行为，旨在保障司法公正、提高司法公信力乃是本文的研究目的。

相比之下，当事人在民事诉讼过程中其诉讼行为出现违反诚信原则的情形，法官当然地依照法律和职权以诚信原则规制当事人违反诚信的行为。如此可见，诚信原则在适用上存在的偏颇是明显的，这也就意味着在法官和当事人之间，诚信原则的适用存在严重的失衡。其实在司法实践中，法官为了完成绩效考核而随意延长审理期限、强制要求当事人撤诉、不履行释明责任、同案不同判等行为，正是违反诚信原则的表现。对于这些行为，法律上也有一定的规制，但是并未与诚信原则的适用相联系。笔者以为，法官在司法过程中违反诚信原则，对当事人诉权及诉讼权利、国家司法信用与司法权威的侵害巨大。

本文主要包括序论和正文。在序论部分，为了更加深入的研究诚信原则对法官适用的理论背景和现状，本文主要介绍研究背景、研究意义和研究方法等。在正文部分，第一章，首先分析当事人与法官诉讼法律关系的平等和不平等，以此说明诚信原则在司法实践中并未真正适用于法官；其次，诚信原则在适用过程中的偏颇、原因及对法官适用诚信原则的必要性进行论述；第二章，探讨司法实践中法官违反诚信原则的形态，总结法官违反诚信原则一般和具体形态并论述判断法官违反诚信原则的三个要素；第三章，阐述法官审判行为违反诚信原则所产生的不利影响，提出可以解释对法官适用诚信原则的相关理论，最后，对法官违反诚信的规制对策进行了探析；结语部分是本文的总结以及目前研究中存在的尚待解决的疑问。

The application of the principle of good faith in the law stems from the regulation of the equal civil subject behavior in the debt law, and then gradually evolved into the basic principle of the civil law. Its establishment in China's civil litigation began with the revision of the Civil Procedure Law in 2012, and the principle of good faith was introduced in Article 13, indicating that the basic principles of substantive law bear fruit in the procedural law. Article 13 of the Civil Procedure Law in 2021, "Civil litigation should follow the principle of good faith" is amended to "civil litigation should follow the principle of good faith", indicating that legislators attach importance to and emphasize the principle of good faith in civil litigation. With the change of the civil litigation from the center of the procedure to the active management of the parties and the judge, the civil litigation mode has changed from the authority to the parties to the synergism, which to some extent can be said to improve the litigation status of the parties. However, only in terms of the application scope of the good faith principle, there is actually a great bias. That is, due to the influence of various factors, at least in the level of the legal system, there is no doubt that the principle of good faith is used to regulate the litigation behavior of the parties to violate the good faith. The application of this principle to regulate the trial behavior of judges is not only controversial in the theoretical circle, but also there is no clear provision in law.

In judicial practice, due to the lack of procedural regulation of the discretion of judges, and the disregard of judicial concepts for whether the principle of good faith can be applied to judges, they do not pay attention to the trial behavior of "breaking trust" of judges. In fact, it is not uncommon for judges to lead to judicial trust crisis due to violations of good faith, and also lead to unfair trial. In this regard, the purpose of this paper is to regulate and restrain the judgment behavior of judges by the principle of good faith, aiming to ensure judicial justice and improve judicial credibility.

In contrast, in the course of civil litigation, the litigant violates the principle of good faith. Of course, the judge regulates the violation of good faith in the principle of good faith according to the law and authority. So it can be seen that the bias in the application of the good faith principle is obvious, which means that there is a serious imbalance in the application of the good faith principle between the judge and the parties. In fact, in judicial practice, in order to complete the performance appraisal, the judge arbitrarily extends the trial period, forces the party to withdraw the lawsuit, fails to perform the interpretation of the same responsibility, which is the violation of the principle of good faith. For these behaviors, there are certain legal regulations, but not associated with the application of the good faith principle. The author believes that the judge violates the principle of good faith in the judicial process, and greatly infringes on the litigation right of the parties and the litigation right, the national judicial credit and the judicial authority.

This paper mainly includes the preface theory and the main text. In the preface section, in order to further study the theoretical background and current situation of the principle of good faith applied to judges, this paper mainly introduces the research background, research significance and research methods. In the main text section, chapter one, First, analyze the equality and inequality of the legal relationship between the parties and the judge, This shows that the principle of good faith is not really applied to judges in judicial practice; next, The bias and reasons of the application of the good faith principle and the necessity of applying the principle of good faith are discussed; chapter two, Exploring the form of judges violating the principle of good faith in judicial practice, Summarize the general and specific form of the judge violating the principle of good faith and discuss the three elements to judge the principle of good faith; chapter three, To explain the prejudicial impact of the judge's violation of the principle of good faith, Propose relevant theories that could explain the application of the principle of good faith to judges, last, To on the judge's violation of good faith; The conclusion section is a summary of this paper and the remaining questions raised in the current study.