The purpose of this paper is to describe the training process and inter-rather reliability evaluation of five coders involved in a research about performance analysis of sport in goalball. The coders participated in a training process, consisted of six face-to-face sessions and four individual exercises, distributed in three phases; Theoretical, Practical and training. After the first two phases, reliability was measured during the development of training period using Multirather Kappa Free. Finally, an almost perfect level of inter-rather reliability (>.86) was obtaining in all variables defined for the research, allowing codificate all goalball match actions that formed the sample.