Abstract: Using the ECMWF data of 1980 to 1983,the intraseasonal component of the variation of the atmospheric heat source <Q1> (vertically integrated) over Asian monsoon region is examined in detail. The large intraseasonal variance of <Q1> is mainly confined over the active monsoon region of Asia and surround areas, and varies seasonally and interannually. The EOF analysis indicates the relationship of intraseasonal oscillations between regions cf India-Burma, the coast of East China and the western Pacific. The spectral analysis of the EOF time coefficients reveals that the dominant period range is around 30-60 day except for the summer of 1980 and the 1982-1983 ENSO period. The propagation of 30-60 day fluctuation in summer varies from region to region by means of lagged correlation analysis.