合同相对方之外的第三人是否能提起对合同效力的确认之诉,这在理论界存在争议,在司法实践中,更倾向于依据第三人与合同之间是否具有法律意义上的利害关系,来判断是否符合《民事诉讼法》第108条规定的起诉条件。 Whether or not a third party other than the counterpart of the contract can bring a lawsuit about the validity of the contract is controversial in theorists. In judicial practice, it is more likely to rely on the legal interests of the third party and the contract Relations, to determine whether the conditions of prosecution under Article 108 of the Code of Civil Procedure.