To have a child with cancer and hospitalized is a painful situation to all family. In most cases, is the mother who stays whit the child in the hospital, being her involvement recognized as fundamental for medical treatment and his recovery. That`s why, it`s necessary an understanding about her real necessities faced with universe of infant cancer. Therefore this study focus on sense of the livings of mothers-being close of children in cancer treatment. This research is quality, with phenomenologic grounding, in which, we used like devices the free observations and -mothers-being close- talks. In among specialties about the livings of mothers-being close, we highlight some expressions that are shared and told by her: faced with diagnosis cancer, they express feelings of unbelievable, despair and disgust; during the going with her child, the mothers tell to feel fear, helpless; they seek desperately a cause for the sickness of their children; they express grateful to the hospital; they show necessity for obtain information about cancer. We understand the -mothers-being close-, during the going into the hospital, need, especially, emotion support, effective and systemic careful, so that, can contribute effectively in the treatment and recovery of their children.