Tidal currents in the Tsushima Straits observed by HF Radars are described in two different points of vjew．First，spatial pattern of the currents of fundamental tidal constituents in the Tsushima Straits are shownn. The results agree well with past observations．Then seasonal variability of the radial amplitudes of M2currents is explained．The radialamplitudes of M2 currents in the Tsushima Straits observed by the radars increase in winter and decrease in summer. This phase property qualitatively agrees well with that of the seasonal variability of the M2 ampliitude of sea level observed around the Tsushima Straits.