This article presents an analysis of the transformations of the social significations of a handicraft activity, the bobbin-lace, and its implications in the process of constitution of a learner subject. The reflexions here presented rely on the theoretical principles of the sociocultural psychology. The recovering of the context, that means, the history of the group in which the subject takes place, as well as the history of the activity itself were important aspects of the path followed. The analysed data come from enterviews held with the subject. The development of the analysis made it possible to conclude that the constitution of the subject is a complex, multisized and permanent process in which the participation of the others does have a significative relevance but does not play a determinant role over the subject's choices, what allows him/her to turn something socially shared into a singular feature.