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Free-fall experiments on a spinning gyro enclosed in a capsule have been conducted in order to investigate the effect of an object's spinning on the fall-acceleration. For ten runs of the fall-acceleration measurements, in which each run consists of right (clockwise), left (counterclockwise) and zero spinning about the vertical axis, it has been shown that the mean value of the fall-accelerations of the right-spinning < g(R) > is significantly smaller than < g(L) > of the left-spinning at 18000 rpm, with the latter being almost identical with < g(0) > of zero spinning. The result suggests that the right-spinning generates anti-gravity, and also that the parity (the reflection symmetry) of gravity breaks down completely. The present result is consistent with previous experiments, which showed that right spinning of a gyro caused weight decrease proportional to the number of rotations whereas left spinning caused no weight change.