This contribution assesses the constitutional-legal and legal-theoretical aspects related to equality in law and in relation to procedural issues such as access to justice, and in concrete contribution by targeting a specific area of dispute resolution in arbitration and are interlinked protect the weaker participants in the process. Doctorate text analyzes the principles of procedural equality, constitutional premise and specifically focuses on the analysis of the diffusion of the principles of equal protection of the weaker party in general and in the above-identified specific types of proceedings on the merits.