This theoretical article analyzes the relevance of establishing units of analysis as theoretical-methodological positions in general and, in particular, proposes perezhivanie as a non-divisive unit of analysis for psychological science. This is proposed as a way to overcome the dualistic matrix and the philosophy of splitting that keeps traditional psychology analyzing and generating knowledge in a fragmented and reductionist way. In this sense, based on the Vygotskian historical-cultural approach, which positions theory and methodology as a dialectical unit that must abandon functionalist and fragmentary perspectives, an approach is proposed from the units of analysis as complex and integral constructions, capable of assuming the totality of psychic phenomena. In this context, the historical-cultural evolution of perezhivanie is analyzed, and it is proposed to use it as a unifying theoretical-methodological unit of analysis in current psychology.