The study aims to determine the causal relationship between barley production, barley cultivated area, barley price, and barley imports in Libya.  The empirical analysis of this study is based on the time series during the period (1990-2014) to utilize the Toda - Yamamoto causality test. The results indicated that the area of barley cultivated, and the barley price were stationary at the first difference, while barley production was stationary at the second difference and barley imports stationary at the level. In addition to that, the model did not suffer from any problems and stability. As for Toda-Yamamoto test for causality among the study variables illustrated to that, there is significant evidence of uni-directional granger causality running from barley imports toward barley production.