A solid-state NMR sample tube and method of using same which can be spun stably and at high speed while suppressing its bending resonance. A solid sample to be investigated by solid-state NMR spectroscopy can be sealed in the sample tube. The sample tube includes a hollow cylinder having opposite ends. At least one of the ends is open. The sample tube has a length L, an outside diameter D, and an inside diameter d which satisfy a given relationship disclosed herein.