Abstract: The aim of the study was to obtain the plant species as the best elicitor in peanut plants, and determine the protein and flavonoids content of peanut plants induced by plant extract elicitors. The study used an experimental method with a completely randomized design (CRD) with 3 replications. The eight types of plant leaves elicitor (E1-E8) tested were Elephantophus scaber (E1), Coleus scutellarioides (E2), Physallis peruviana (E3), Persea americana (E4), Nothopanax scutellarium (E5), Annona muricata (E6), Piper betle (E7), and Syzygium polyanyhum (E8). Observations were made when plants were 50 days after planting (DAP), including analysis of protein and flavonoid content. The results of the research data were analyzed by variance, if there was significantly difference; further analysis was carried out with the Smallest Significant Difference test (LSD) at the 0.05 level with the SPSS Version 20. The results of the study showed that the highest protein content in E1 treatment were 251.55 mg / kg, the lowest in the control was 216.84 mg / kg. The highest flavonoid content in E2 treatment was 30.99 mg / kg, the lowest in the control was 25.73 mg / kg. The elicitor application of plant extract increased the protein content and flavonoids of peanut plants.