In the inner zone of a typhoon, centering at 20°_??_30°N latitude even at the altitude of high clouds, the spirally inflowing currents in cyclonic sense are often observed. The neutral plane must then lie higher than the level of high clouds. Also the outflowing currents in anticyclonic sense at the level of high clouds are also observed. Thus the observational material of high clouds in the inner zone of a typhoon, gives a good evidence in favor of the view that a tropical cyclone have about the same height as the cyclone of middle latitudes, and that the height of the neutral plane is estimated to be about 10 km.