목적: This study aimed to compare binaural advantage for auditory localization and speech perception in noise of children with bimodal fitting or bilateral cochlear implantation (CI). 방법:Ten subjects with bimodal fitting and seven subjects with bilateral cochlear implantation were recruited. Mean duration of hearing aid use in bimodal fitting group was 8.1 (+1.9) years. Sound localization test and hearing in noise test were performed with a 13-loudspeaker array (from -90 to +90). Mean correct response rate and error degree were calculated for each patient. For hearing in noise test, speech reception scores were measured for target speech in front (0), and babble noise in front, distributed asymmetrically toward the right (+90) or left (-90), or symmetrically toward the right and left (+90/-90). For evaluation of subjective benefit, the Speech, Spatial, and Quality questionnaire (SSQ) were also administered. 결과:Mean correct response rate and error degree with bilateral implants and bimodal fitting were 15.4% and 39.5, and 13.8% and 35.4, respectively. In noise from the front, mean speech reception scores were 47.8% and 51.0% in bilateral implant and bimodal fitting groups, respectively. When noise was presented toward bilateral side, mean speech reception scores were 39.3% and 41.3% in bilateral implant and bimodal fitting groups, respectively. SSQ scores were also comparable between the two groups. Of note, mean error degrees were significantly decreased when second CI was turned on or hearing aids was put on as compared with conditions only using unilateral CI in both groups. 결론:No significant differences were found between the two groups in terms of sound localization and speech recognition in noise as well as subjective benefit in everyday life.