Tagged red sea bream Pagrus major of 0 year-old and drift-cards were simultaneously released at Setoda, and Kashima in the Seto Inland Sea to survey the influence of tidal current on the dispersion of the red sea bream. At each point we released two groups of red sea bream which were cultured in different places. No difference could be found between the recapture rates of the two groups of sea bream. The direction of the movements of the red sea bream from both the Setoda and Kashima groups were southwestward. The average speed of the movement the Setoda group was 0.34 km/day and the standard deviation around the center of the recapture locations was about 10 km. The Kashima group were recaptured near the released point. The direction the drift-cards moved was the same as released fish, southwestward. The drift-cards released at Setoda and Kashima were carried away at average velocities of 1.29 km/day and 1.36 km/day, respectively. Those velocities are 4〜5 times of than those of red sea bream. These facts suggest that the movement of the red sea bream 0 age group is caused by the tidal current.