The aim of this work is to propose Intersubjectivity as a key concept in a social interpretation of online dynamics while studying CyberPsychology and its applications. Dialogue is the inner soul of the Self, considered as “a dynamic multiplicity of voiced positions.” The link between the Self and the Others must be considered too. Through dialogue, interlocutors negotiate both ideas and their self-images. Starting from ‘single’ intentions (a representation of what each participant wants to present outside), interactions support a co-construction of shared and linked images of interlocutors, called Subjectivities. These two or more Subjectivities are the basis of the Intersubjective dimension of an interaction.