[en] This paper reports an interesting finding regarding the pulse shape change of Hercules X-1. By inspecting Her X-1 observations made by various detectors over various epochs, I have found that during the decay phase of the 35/sup d/ cycle high state the first-peak flux (of the double-peaked main pulse) is attenuated more then the second-peak flux. Accepting that the 35/sup d/ cycle is due to the wobbling of the accretion disk, I propose a model in which the first-peak emission and the second-peak emission emanate from two different emitting regions (two magnetic poles). According to this model, during the decay phase of the 35/sup d/ cycle the column density of the coronal gas (on both faces of the inner part of the accretion disk) along the line of sight to the first-peak emission region is larger than that to the second-peak emission region, and thus the Compton scattering attenuation of the first peak is larger at a given moment during the decay phase. Implications of the model are also discussed