The article presents the results of a study conducted on a sample of 80 women aged 19-25 and 72 women aged 40-74. The relationships of the two components of self-complexity (the quantity of self-aspects and the amount of overlap between their contents) with the multidimensionally defined sense of identity were examined. Additionally, phase of life differences in the magnitude of these relationships were also investigated. I used the Self-Complexity Questionnaire (SCQ; Barczak, Besta, & Bazińska, 2007) and the Multidimensional Questionnaire of Identity (MQI; Pilarska, 2012). The obtained results showed that the predictive importance of the number of roles for the sense of identity was marginal, whereas the similarity in the content of roles seemed to favor maintaining the sense of identity. In addition, although significant differences were observed in the self--concept structure and the strength of the sense of identity between the two groups of women, the relationships between these areas of personality were not affected by the phase of the life cycle.Keywords: role overlap; sense of identity; multiple roles; self-complexity.The formation and maintenance of the sense of identity are issues that become particularly important in the context of the current reality, marked by relativism, multidimensionality, and discontinuity. This is because the model of "a changing man in the changing world" (Harwas-Napierała, 2007, p. 21) means a return to thinking about the self in terms of numerous situationally activated self-images. With the self recognized as the basis (material, substance) for identity building, it seems appropriate to look for an answer to the question of what significance the differentiation and variability of the self have to the sense of identity.