The aim of this research is to estimate the family saving function in the Libyan economy, an applied study on the city of Misurata. For the purpose of achieving the research goal, the descriptive quantitative approach was followed using the standard method in estimating the family saving function. The results of the descriptive statistical analysis showed that the average income of the total sample members is (2424.1). dinars) and that the average savings is (660.7 dinars), and the average consumption is (1766.3). The standard results also showed that there is a statistically significant effect of the effect of income on family saving, as the estimated saving function showed that the amount of saving independent of income is (505.7 dinars), and it reached The marginal propensity to save was (0.058), and the relationship was direct between saving and the number of family members, as increasing the number of family members by one person leads to an increase in saving by (33.1) dinars. This means that one of the most important factors influencing family saving is income and the number of family members. Keywords: family saving, family consumption, disposable income, Libyan economy.