The objective of the present work is to understand the mother s role in its relation with the baby with congenital heart disease. Based on Winnicott s theory, it shows that the facilitating environment is the fundamental element for a good enough relationship or a not good enough one. An interview guide was used to collect the data, which has a semi-structured conversational format; mother-baby relationship s drawing were used too. Four mothers of babies (from 1 to twelve months old) with congenital heart disease had been interviewed. The results revealed themes related to the way these mothers get used to the situation of having a baby with congenital heart disease; to the impact caused in the family; to the maternal feelings and attitudes and to the fear of the baby s death. From these results, this study proposes that, just like the baby, the mother needs to be cared and supported. For this, it is essential to take care of the mother s environment too, represented by her husband, by her children, by her family and by her friends. The type of the relationship established between the mother and the baby will depend on the care taken by this environment.