Objective: To evaluate the hearing of suckle with cytomegalovirus (CMV) congenital by means of the auditory reply of steady state (RAEE). Story of the case: Suckle with 4 months of age, masculine sex, with diagnosis of CMV congenital carried through examination of transient otoacoustic emissions (EOAT), product of distortion (EOAPD), potential evoked auditory of brainstem (PEATE) and RAEE in the frequencies of 500, 1000, 2000 and 4000Hz modulated respectively in 97, 81, 95 and 88Hz to the right and in 92, 77, 84 and 85Hz to the left, dichotic presentation. The suckle presented absence of EOAT and EOAPD, to the 4 months of age. In the first PEATE, interpeak the absolute latencies and they had been adjusted for the age, with electrophysiological threshold in 30 dBnHL. After two months presented bilateral absence of PEATE to 100dBnHL. The mannering evaluation of the hearing, to the 6 months of age, revealed harmed due to the delay in the neuropsychomotor development, becoming difficult to establish the reactions front the sonorous stimulations. It was submitted to the examination of RAEE, the 8 months of age and the joined thresholds had been 50dB, 70dB, absentee in 110dB and absentee in 100dB, respectively for 500, 1000, 2000 and 4000Hz to the right and in 70dB, 90dB, 90dB and absentee 100dB, respectively for 500, 1000, 2000 and 4000Hz to the left. CONCLUSION: The emissions had been modified since the first evaluation, the PEATE was modified to the 6 months of age and the intensity of the auditory loss only can be identified by means of the RAEE what it allowed to better establish behavior in the auditory adaptation of prosthesis.