The study amid at exploring and detecting the level of social adaptation and its relationship with the achievement motivation of the secondary school students in Jordan, the study sample consisted of 495 secondary school students in the province of Jerash, and to achieve the objective of this study comes the development of two tools: the first one measures the social adaptation, and the second one measures the achievement motivation. The study found many results, including: that the level of social adaptation and achievement motivation among secondary school students in the province of Jerash were high, and also showed the presence of a statistically significant positive relationship between the social adaptation and the achievement motivation among the secondary school students in the province of Jerash too; therefore and in light of these results, the researcher recommends conducting further studies exploring the social adaptation relationship to other variables.