The purpose of this article is to present the role of the assessor in the processus brevior coram Episcopo. Processus brevior was introduced in 2015 in motu proprio Mitis Iudex Dominus Iesus, which establishes the legal obligation to appoint an assessor. The assessor’s role in the process comes down to advising the judge and pointing out various options for settling them with specific arguments. The assessor has the right to support the instructor in his task and the assessor’s participation in the process is auxiliary. The assessor may present his opinion in written and oral form. Proper substantive preparation and accurate performance of their duties will allow the assessor to properly and effectively perform his auxiliary function. In processus brevior, the bishop as a shepherd-judge is to make a decision, and the assessor as a non-binding voice is to help him come to the truth in a specific marriage, achieve moral certainty and give a just judgment. The assessor may, however, have an indirect impact on the decision being made by consulting the bishop and instructor before the judgment is issued.