The research aimed to study the level of self-defeating among adults, identify the ordinal scale of the time perspective dimensions, the possibility of predicting self-defeat through the dimensions of the time perspective, and the correlation between self-defeating and the time perspective. A random sample of (300) male and female adults from the city of Aleppo was selected. Self-defeating scale prepared by Abu Halawa and Rizk (2013), and the Arabic version of Zimbardo’s Time Perspective Inventory (ZTPI) (1999) which Arabization of Jarallah and Sharafi (2009), were applied. The results indicated to: • There is a low level of self-defeating among adults. • The most widespread dimension of time perspective is the inevitable present • The dimensions of time perspective explain about (72.4) % of the variance in self-defeating, and the dimensions of the positive past, negative past, and inevitable present have predictive power for self- defeating. • There is a statistically significant correlation between self- defeating and time perspective.