Accelerated ageing test is considered a reliable viability routine test of official seed inspection in most countries of the world, despite its importance; it hasn't been used in Egypt yet. The international Seed Testing Association (ISTA) standardized this test for many species excepting for faba bean. Therefore, the main objective of this study was to determine the ideal test conditions including the relative humidity (75% and 100%), temperature degrees (39, 42 and 45°C)  and time of exposure (3, 4 and 5 days), to which the seeds are undergo in the incubator, then assessing the physiological quality of faba bean seed under laboratory and field conditions. The results indicated that increasing the relative humidity up to 100% and temperature to 45°C and exposure period for 5 days increased seed moisture content and reduce the capability of seed to germinate and produce normal seedling under laboratory and field conditions, reduce seedling length and increase the mean germination time. The results indicated also that the correlation coefficient for the relationship between laboratory germination and field emergence was positive and highly significant (R=0.948) when the seeds were aged at RH 75%, while it was negative and significant (R=–0.921) at RH 100% regardless of other aging conditions. Obviously, the accelerated aging test could be a practical and an accurate determinant of faba bean seed quality under laboratory or field conditions provided that the relative humidity is 75% and the temperature is between 39-42°C for 3-5days.