We examined effects of handedness on the judgment of temporal order of successive taps delivered to both hands. When the subjects’ arms were uncrossed, the temporal resolution (84% correct responses) of right-handed subjects (52 ± 4ms, n = 16) was significantly better than that of left-handed subjects (83 ± 9ms, n = 16). When their arms were crossed, both groups tended to invert their judgment to a similar extent at intervals as long as 200–300ms. In the arms crossed condition, right handed subjects inverted their judgment more often in response to left-hand-first stimuli than to right-hand-first stimuli, whereas left-handed subjects did not show the same asymmetry. We infer that hemispheric lateralization, which is generally stronger in right- than in left-handed subjects, contributes to the relatively better temporal resolution of right-handed subjects in the uncrossed condition, as well as to the asymmetric effect of stimulation order in the crossed condition.