Abstract
The study aimed to identify the level of psychological well-being and its relationship to psychological immunity among a sample of married underage girls in the governorates of the Northern Region. In order to achieve the objectives of the study, a sample of (422) married underage girls in the governorates of the Northern Region was selected. They were selected using the available method. Two scales were developed: the psychological well-being scale and the psychological immunity scale, and their psychometric characteristics were verified. The results of the study concluded that that there is average level of psychological well-being and psychological immunity among the sample of married underage girls. And There is a statistically significant positive relationship between the dimensions of psychological well-being and the total score, and between the dimensions of psychological immunity and the total score.