Abstract:Squash, paraffin section and chromosome banding technique were used to observe the condition of the intercellular chromatin migration (cytomixis) and chromo- some aberration in pollen mother cells (PMCs) of Vicia faba. The following phenomena were found in our experiments; 1. Cytomixis also occurred at synizesis stage. 2. 8.08% of PMCs had a chromosome number deviating from their normal numbers (n=6). 3. The changes in chromosome structure included the chromosomes with a increased or decreased length and chromosome bridges. 4. Appearance of anucleate and binucleate PMCs. Plenty of evidenee shows that the last three phenomena are related to the first one.