<p><strong><em>Introduction</em></strong><em> Some plants in Indonesia contain secondary metabolites and antioxidants, one of which is the Maja Plant. The part of the maja plant used in this research is the structure of the plant which includes the fruit, skin and leaves because it is thought to have antioxidant content. </em><strong><em>P</em></strong><strong><em>urpose</em></strong><em>&nbsp; this study was to compare secondary metabolites found in the fruit, skin and leaves of maja. And to determine the antioxidant activity in these samples.</em> <strong><em>M</em></strong><strong><em>ethod</em></strong> <em>experimental study method</em><em> was used in this research. The population used is the maja plant. Samples were obtained from the Slerok Village, Tegal City, Central Java using the simple random sampling technique. </em><strong><em>Results</em></strong><em> The</em><em> results</em><em> yield extracts of maja fruit, skin, and leaves were </em><em>48,5</em><em>%, 90</em><em>,</em><em>4% and 32</em><em>,</em><em>8%, respectively. The fruit, skin and leaf extracts of maja have the same secondary metabolite content in the form of tannins, alkaloids (Wagner), and vitamin C. While the IC</em><em><sub>50</sub></em><em> obtained in the fruit, skin and leaf extracts of maja are 2897,3434 ppm, 7321,49</em> <em>ppm, and 37</em><em>,</em><em>0937 ppm. </em><strong><em>C</em></strong><strong><em>onclusion</em></strong><em> of this study is that there are secondary metabolites in the extracts of fruit, skin and leaves of maja. And the strongest antioxidant activity is found in maja leaf extract.</em> <strong><em>Suggestion</em></strong><em> Further researchers are expected to be able to carry out research again with different extraction methods in order to know the results of different extraction methods.</em><em>&nbsp;</em></p>