The object of this thesis is the teaching skills and knowledge that pre-school teachers have. Its purpose is to understand how the process of construction and circulation of this knowledge, linked to historic and institutional aspects, reveals the construction of the Child Education teacher´s identity. Assuming that the teaching knowledge is always a knowledge towards the other, made explicit in the interpersonal relationships and mediated by language, this thesis seeks to find, under the voice of pre-school teachers, the meaning of this profession which has been and still is built on the paradox of affirmation and denial and on the tension between the discourses which have historically built an identity for the Child Education teacher and the perception of these professionals about their teaching skills. The analyses developed in this study are based on empirical material produced along with field research, in three municipal schools for Child Education, all of them part of the Public School System of Juiz de Fora, and on Mikhail Bakhtin s language theory. From these analyses, it was possible to understand the teaching skills that Child Education teachers have gathered from three reference knowledge facts: knowing how to play, knowing how to share experiences and knowing how to welcome others. These do not find room for affirmation and circulation in institutional contexts, marred by time fragmentation and interpersonal relationships, where teachers act and which are reflected on the way these characters build their professional identity.