The arbitration clause needs to consider whether it is reasonably to contribute quickly and inexpensively dispute resolution, or if such a condition interferes with the commencement of arbitration and takes time and money. In the UK, this is discussed in the establishment and validity of the prior recourse to mediation clause and prior recourse to negotiate in good faith clause. This point is related to the establishment and validation of the arbitration clause, so the review field is centered on the contract law and the arbitration law. In this study, after examining the preconditions in the UK contract law and the UK arbitration law, it discusses the arguments related to the significance of the dispute, and examines whether the claims and reject before the commencement of the arbitration proceedings are the requirements for the commencement of arbitration.