伴随着房屋中介市场的发展和以转租为生的“二房东”的出现,“转租”成为我国房屋租赁市场的一个普遍现象,并且产生了很多的纠纷和矛盾,对社会秩序的维护和稳定形成了很大的影响。特别是在擅自转租的情况下,次承租人处于转租关系的薄弱环节,究其原因,与擅自转租的房屋合同的效力问题关系莫大,因此应当通过确定擅自转租房屋合同的合法性来保护次承租人的合法权益。 With the development of the housing agency market and the emergence of “two-landlord” sublets, “sublease” has become a common phenomenon in our country’s rental market and has generated many disputes and contradictions. The maintenance and stability of the order have had a great impact. Especially in the case of unauthorized subleasing, the sub-lessee is in the weak part of the sublet relationship. The reason is very much related to the validity of the house contract without sublease. Therefore, the legality of the sublease of a house contract should be determined To protect the legitimate rights and interests of lessees.