A study was conducted in vertisols to determine variation in runoff, soil loss and particle size distribution of eroded material with different Antecedent Moisture Condition (AMC) under simulated rainfall condition. The runoff and soil loss increased as AMC increased. However the particle size distribution in the eroded sediment was not affected by either antecedent moisture condition or by total runoff. But the amount of each particle size varied with increasing AMC.