In this study, Caper plant were collected from Al-Jabal Al-Akhdar region (Libya) during the spring season (2023), the leaves and stems of the plant were separated and dried in the open air. The contents of minerals and metals (Na, K, Ca, Fe and Ni) were determined. The strength of antioxidants was determined using the Prussian blue method. Also, phenol compounds were estimated by the Folin Ciacalteu Method. The results showed that the metal values were showed higher contents in the leaves comparing with their contents in the stems, where a relative increase was found in the leaves of capers with a value of (1.83 ppm) compared to its value in the stems (0.94 ppm), the phenol contents were recorded in leaves (0.530 ppm), and stems (0.362 ppm). The anti-bacterial activity using different concentrations of the plant extract concentrations of (25,50,75 and100%) on two types of bacteria (Bacilli and Escherichia Coli) was applied for the extracts. The results showed that the inhibition zone of the leave extracts was recorded in all concentrations of Bacilli, in the stems the high inhibitaion zone were observed for concentrations (75%, &100%). The leaves and stems extract didn't showed any effect on Escherichia coli except for high concentrations of leaves (100%).