  We present the results of the radio observations of the afterglow of GRB
030329 with the Nobeyama 45-m telescope. The observations were made at 23.5
GHz, 43 GHz, and 90 GHz. The light curves show steep decline after constant
phase. The start time of the decline depends on frequency. Namely, the decline
started earlier at higher frequency. The spectrum has a peak at mm wavelength
range. The peak frequency and the peak flux decreased with time. These results
are consistent with the expectation from fireball model.
