The purpose of the study was to investigate ear dominance of preschool children with special attention co its occurrence in conjunction with other aspects of dominance. Thirty-seven children were studied to determine whether a preference could be demonstrated in their use of hand, foot, eye, and ear. Ss ranged in age from 2 yr. and 2 mo. to 5 yr, and 4 rno. Each child was observed in several situations and simple tests were 11sed.l If a child did not show decisive and/or consistent preference he was recorded as showing uncertain dominance for that aspect. Of 37 Ss, 30 (81% ) demonstraced ear dominance, 22 (70.33% ) of them for the right ear. Only 20 Ss (54.06%) were found to have established dominance in all four aspects; 13 or 65% of these were completely right dominant (RH,RF,RE,RE). Eighteen of these 20 Ss or 90% demonstrated parallel dominance (RH,RF,RE,RE or RH,RF-LE,LE). Of the seven children with mixed dominance five or 71.43% were parallel dominant (RH,RF-LE,LE). In conclusion, within the limitations of the study, ear dominance is demonstrated by children of preschool age. Ear dominance appears as early as the third year of life (before age three). Ear dominance, like other aspects of dominance, is preponderantly right. Further stitdy seems appropriate with larger groups. The tendency toward sensory (eye-ear) and motor (hand-foot) agreement, the relation of hearing acuity and preference, and the relationships of eye and ear dominance as associated with reading and other communication problems need further exploration.